Last week we demonstrated a major leap in our ability to automatically segment television evening news broadcasts into their underlying stories by annotating rather than indexing. Naturally, we received a lot of interest in how robust these findings were, whether we could achieve similar accuracy when run over a larger sample and, most importantly, how they compare with human segmentation of those broadcasts. To answer these questions, we examined an entire week of CBS Evening News broadcasts from this past February, segmenting them through Gemini 2.5 Pro, Gemini 2.5 Flash Thinking and Gemini 2.5 Flash Non-Thinking models and comparing their results to Vanderbilt Television News Archive's hand-compiled story segmentation for each broadcast. Across the five days examined here, all three Gemini models perfectly matched the Vanderbilt human segmentation, capturing every single story identified by the human annotator and in several cases took major stories that were lumped under roundup segments and made them their own entries for additional analytic clarity. Gemini 2.5 Pro and Gemini 2.5 Flash Thinking produced nearly identical results on all five broadcasts with accurate segmentations and transcript annotations, while Gemini 2.5 Flash Non-Thinking yielded nearly identical segmentation, but encountered greater challenges in transcript annotation. Overall, Gemini Thinking models were able to achieve human-level story segmentation on this sample week of evening news broadcasts.

Let's start with the February 10th, 2025 CBS Evening News broadcast. You can compare the results below with the Vanderbilt Television News Archive's hand-compiled story segmentation for this broadcast.

We use the following prompt:

Below is a television news transcript. You are a news cataloger whose job it is to read television news transcripts and identify each of the stories described within. Read the transcript below and make a list of all of the stories it describes. Each story may be mentioned multiple times in multiple places in the transcript. Number the stories in sequential order from 1. Output the story list as JSON records, one per row, with fields STORYID, TITLE and DESCRIPTION and a field TYPE that is "STORY". Then go through the transcript below and break it into chunks relating to each story and output each chunk as a JSON record, one per row, that has fields STORYID and TXT and TYPE="CHUNK" to create an annotated version of the transcript and fill in the STORYID with the story number for that story.

TELEVISION NEWS TRANSCRIPT:

Gemini 2.5 Pro (06-05) matches Vanderbilt's human segmentation exactly other than the first story on pain relief exercises which is due to an earlier broadcast bleeding into the first few minutes of the broadcast in the Internet Archive's version (this could be removed by adding additional instruction to Gemini to ignore preceding programming):

{"STORYID": 1, "TITLE": "Simple Exercises for Pain Relief", "DESCRIPTION": "A segment demonstrating four simple exercises to alleviate common pains. The exercises are designed to stretch glutes for sciatica, strengthen knee-surrounding muscles for knee pain and shin splints, improve thoracic spine mobility for shoulder tightness, and activate hips to reduce lower back pain.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Trump Administration Audits Federal Agencies with Elon Musk", "DESCRIPTION": "President Trump, in his second term, has tasked Elon Musk and his team, known as 'Doge', with auditing federal government agencies to find waste, fraud, and abuse. The story focuses on their controversial attempt to access the Bureau of Fiscal Service, which handles sensitive financial data for Americans, including Social Security payments and tax refunds. The report covers the legal challenges, data security concerns raised by experts, and the lack of transparency from the White House about the audit's scope and findings.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Trump Imposes Import Tax on Steel and Aluminum", "DESCRIPTION": "As part of a global trade war, President Trump has placed a 25% import tax on steel and aluminum. The tax affects key U.S. trade partners, including Canada and Mexico.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "DeVonta Smith Joins Elite NFL Group", "DESCRIPTION": "Following the Philadelphia Eagles' Super Bowl victory over the Kansas City Chiefs, wide receiver DeVonta Smith becomes the fifth player in NFL history to have won a Heisman Trophy, a college national championship, and a Super Bowl.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "U.S. to Stop Minting Pennies", "DESCRIPTION": "President Trump has ordered the U.S. Treasury to cease production of the penny, citing cost-saving measures. The segment explains that it costs over three cents to manufacture a one-cent coin. The story also touches on the high cost of nickel production, lobbying efforts by the zinc industry to keep the penny, and potential inflationary effects of eliminating the coin.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Investigation into High Cost of Migrant Deportation Flights", "DESCRIPTION": "An investigation reveals the high taxpayer cost of the Trump administration's policy of using military transport jets to deport migrants. The cost per hour for a military C-17 jet is shown to be more than three times that of a standard charter flight, with some flights costing hundreds of thousands or even over a million dollars. The story also notes the expansion of a migrant holding facility at Guantanamo Bay and compares current ICE arrest numbers to previous administrations.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "National Weather Forecast: Back-to-Back Winter Storms", "DESCRIPTION": "A weather report details a series of winter storms moving from the Midwest to the East Coast. The forecast predicts significant snow for cities like Chicago, Philadelphia, and Washington D.C., and heavy rain in the Southeast, particularly impacting areas still recovering from Hurricane Helene.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Inflation's Impact on a Small Washington Town", "DESCRIPTION": "An 'Eye on America' segment from Connell, Washington, explores the local economic devastation following the closure of a major potato processing plant, which supplied french fries to fast-food chains. The closure, attributed to a national decrease in fast-food sales caused by inflation, has led to widespread job loss, city budget cuts, and struggles for local businesses in the small town.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "CBS Evening News Launches Expanded Streaming Show", "DESCRIPTION": "An announcement marks a new chapter for the CBS Evening News with the launch of 'CBS Evening News Plus,' a second half-hour program streaming on CBS Evening News 24/7. The new show aims to provide more context to the day's news.", "TYPE": "STORY"}

Gemini 2.5 Flash Thinking Mode (05-20)  also matches the Vanderbilt segmentation exactly except for the addition of an additional story in which it breaks a brief preview clip of a story airing the following day into its own story listing:

{"STORYID": 1, "TITLE": "Trump Administration's \"DOGE\" Initiative and Elon Musk's Federal Audit", "DESCRIPTION": "President Trump's second term begins with a new CBS News poll showing 53% approval. A key initiative is the \"Department of Government Operations and Spending\" (DOGE), led by Elon Musk, tasked with auditing federal agencies for waste, fraud, and abuse. This story focuses on the Bureau of Fiscal Service, the agency responsible for government payments, including Social Security, and concerns regarding data security, legal challenges under the 1974 Privacy Act and 2002 Cybersecurity Law, and potential infiltration of sensitive government databases. It also mentions other agencies targeted by DOGE, such as FEMA, Department of Energy, Labor, CDC, and EPA.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Trump Escalates Global Trade War with New Tariffs", "DESCRIPTION": "President Trump raises stakes in his global trade war by imposing a 25% import tax on steel and aluminum, affecting key trade partners like Canada and Mexico.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "DeVonta Smith Achieves Rare NFL Milestone", "DESCRIPTION": "Following the Eagles' Super Bowl victory, wide receiver DeVonta Smith becomes the fifth player in NFL history to win a Heisman Trophy, a National Football College Championship, and a Super Bowl ring.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "President Trump Orders Halt to Penny Production", "DESCRIPTION": "President Trump orders the U.S. Treasury to stop minting pennies, citing economic inefficiency as it costs more to produce a penny ($0.03) and a nickel ($0.14) than their face value. The segment discusses the government's $103 million loss last year from coining pennies and nickels, historical context from \"60 Minutes,\" potential inflationary impact, and lobbying efforts by zinc manufacturers.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "High Cost of Deporting Immigrants Using Military Jets", "DESCRIPTION": "An investigation into the taxpayer cost of deporting immigrants illegally present in the U.S. using military transport jets. The report highlights the unprecedented use of C-17 military aircraft for deportations to Ecuador and Guatemala, with single flights costing hundreds of thousands of dollars, significantly more than commercial charter flights. The segment also covers operations at Guantanamo Bay and the administration's justification for the expense as a cost-saving measure compared to housing migrants.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Consecutive Winter Storms Hit Midwest and East", "DESCRIPTION": "A weather forecast detailing two consecutive winter storms impacting the Midwest and East Coast in February. The first storm brings snow to areas like Sioux Falls, SD, and is expected to combine with moisture in the Northeast, affecting cities like Philadelphia and Washington D.C. A second, more moisture-laden storm follows, with Chicago expecting significant snowfall and concerns about heavy rain impacting areas still recovering from Hurricane Helene in North Carolina and the Tennessee Valley.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Inflation Devastates Connell, Washington Economy", "DESCRIPTION": "An \"Eye on America\" segment from Connell, Washington, a town dependent on a major potato processing plant. Inflation, leading to decreased fast-food sales, caused the plant to close and lay off all workers, severely impacting the local economy through job losses, reduced tax revenue, and declining business for local establishments like coffee shops and pizza restaurants. The story explores the challenges small towns face when their main employer is affected by broader economic trends.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Upcoming Report: Security Threat from Foreign-Made Port Cranes", "DESCRIPTION": "A preview for a future \"Eye on America\" segment investigating whether foreign-made giant cranes used at U.S. ports pose a national security threat, raising concerns that the manufacturing country might be using them for espionage.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Launch of CBS Evening News Plus", "DESCRIPTION": "Announcement of the expansion of \"CBS Evening News\" to a second half-hour program called \"CBS Evening News Plus.\" This new segment aims to provide additional context to the news, with upcoming topics mentioned including the dangers of Artificial Intelligence and the comeback of measles, along with parents opting out of vaccines.", "TYPE": "STORY"}

Gemini 2.5 Flash Non-Thinking Mode (05-20)  also matches the Vanderbilt segmentation exactly except for breaking the complete list of previewed stories into their own story element:

{"STORYID": 1, "TITLE": "Trump Administration's Audit of Federal Agencies by Elon Musk's DOGE", "DESCRIPTION": "President Trump has appointed Elon Musk to lead a temporary White House initiative, the Department of Government Operations (DOGE), with the ambitious goal of auditing federal government agencies to expose waste, fraud, and abuse. This includes sensitive government databases. A federal judge has blocked DOGE's access to the Bureau of Fiscal Service, which handles government payments including Social Security. Concerns have been raised about data security and transparency, as well as the legality of Musk's team accessing such sensitive information without proper cybersecurity protocols. Questions also remain about the efficacy and evidence of the fraud and waste claims.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "President Trump's Global Trade War and Import Taxes", "DESCRIPTION": "President Trump is escalating his global trade war by imposing a 25% import tax on steel and aluminum. This tax applies to imports from America's top trade partners, Canada and Mexico, raising concerns about international trade relations.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "DeVonta Smith's Elite NFL Achievement", "DESCRIPTION": "Following the Eagles' Super Bowl victory over the Kansas City Chiefs, wide receiver DeVonta Smith has joined an elite group of NFL stars. He is now only the fifth player in league history to win a Heisman Trophy, a National Football College Championship, and a Super Bowl ring.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "President Trump's Order to Stop Minting Pennies and Nickels", "DESCRIPTION": "President Trump has ordered the U.S. Treasury to stop minting pennies, believing that it doesn't make economic sense. This decision aligns with previous discussions, including one 17 years ago on '60 Minutes' that highlighted the potential inflationary downside of scrapping lower denominations. Currently, it costs over $0.03 to manufacture a penny and nearly $0.14 for a nickel, resulting in a government loss of $103 million last year. The legality of this order by presidential decree is in question, as Congress typically sets currency specifications. Lobbying efforts from zinc manufacturers and public sentiment regarding nostalgia and potential price rounding are also factors.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Winter Storms Across the Midwest and East", "DESCRIPTION": "The Midwest and East Coast are experiencing back-to-back winter storms. The first storm, originating out West and tapping into Gulf moisture, will bring snow to the Northeast, with some Southern areas receiving higher accumulations. A second, more significant storm is expected Wednesday night into Thursday, following a similar path but with much more moisture, potentially causing heavy snowfall in Chicago and significant rain in areas still recovering from Hurricane Helene, like North Carolina and the Tennessee Valley.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "The Cost of Deporting Immigrants Using Military Jets", "DESCRIPTION": "The Trump administration is utilizing military transport jets, specifically C17s, to deport immigrants who are in the country illegally. This unprecedented move is significantly more expensive than standard charter flights, with a single C17 flight costing over $28,000 per hour, more than triple the average cost for regular passenger aircraft. Examples include a nearly $300,000 flight to Guatemala and round-trip costs exceeding $1 million for flights to India. The U.S. military is also expanding a migrant operation center at Guantanamo Bay to hold up to 30,000 people, with initial flights having a very high per-person cost. While expensive, the administration justifies these costs by weighing them against the expense of housing and feeding migrants within the U.S. There are questions about whether this process could be done more cost-effectively and the deterrent message it sends compared to previous administrations.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Inflation's Impact on Connell, Washington, and the Potato Industry", "DESCRIPTION": "The town of Connell, Washington, heavily dependent on a potato processing plant, has been severely impacted by inflation. The plant, which processed 300 million pounds of potatoes annually, laid off all its workers due to a national decrease in fast-food visits and subsequent drop in French fry sales, attributed to inflation. This closure has devastated the local economy, leading to job losses, a 10% cut in the town's budget due to lost tax revenue, and a significant decline in sales for local businesses like pizza restaurants and coffee shops. Residents feel worse off due to persistently high prices, and the town is struggling to find new ways to restore prosperity.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Future Stories: AI Dangers, Measles Comeback, and Port Security", "DESCRIPTION": "Upcoming segments on CBS Evening News Plus will explore the dangers of artificial intelligence and its potential to outsmart humans. Another story will address the comeback of measles and interview parents who opt out of vaccinating their children. Additionally, a segment on Eye on America will investigate a security threat at U.S. ports, specifically questioning if the country that manufactures giant cranes is using them for espionage.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Expansion of CBS Evening News and Launch of CBS Evening News Plus", "DESCRIPTION": "The CBS Evening News, a pioneer in electronic journalism since 1963 when it expanded to a half-hour, is now launching a new chapter. It will include a second half-hour program called CBS Evening News Plus, an extra 30 minutes designed to provide news in context. This new segment will stream on CBS Evening News 24/7, continuing its pioneering role in news programming.", "TYPE": "STORY"}

Next we'll examine the February 11th, 2025 CBS Evening News broadcast. You can compare the results below with the Vanderbilt Television News Archive's hand-compiled story segmentation for this broadcast.

Gemini 2.5 Pro (06-05) matches Vanderbilt's human segmentation exactly for the major stories, but actually goes further and instead of lumping Marc Fogel and Elon Musk's DOGE efforts into a single roundup story, it breaks them into two separate stories. Similarly, while Vanderbilt's summary makes no mention at all about avian flu, Gemini's summary notes that this forms a major story in the broadcast. The foaming soap story is again an example of the earlier broadcast bleeding into the first few minutes of the Archive's version of the broadcast:

{"STORYID": 1, "TITLE": "DIY Foaming Soap", "DESCRIPTION": "A short segment demonstrates how to make foaming hand soap at home using a special dispenser, water, and liquid soap, which is presented as a cost-saving measure.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "US Post-Pandemic Educational Crisis", "DESCRIPTION": "A troubling report reveals that five years after the COVID-19 pandemic, American students are still significantly behind in reading and math. The story explores the causes, including chronic absenteeism, and highlights successful recovery strategies like high-impact tutoring and cell phone bans being implemented in some school districts, such as in Washington, D.C.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Russia Releases American Teacher Marc Fogel", "DESCRIPTION": "American teacher Marc Fogel of Pennsylvania has been released by Russia after being detained for nearly four years. He was arrested in Moscow for possession of medical marijuana. President Trump stated that Russia did not receive much in return for the release.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Elon Musk's Investigation into Government Waste", "DESCRIPTION": "Billionaire Elon Musk is investigating potential fraud and waste within the federal government's payment systems. However, after meeting at the White House, neither Musk nor the President provided any specific examples of crime or corruption found.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Avian Flu Outbreak Affects Egg Supply", "DESCRIPTION": "A nationwide outbreak of avian flu has led to a scarcity of eggs, making them a hot commodity. The shortage is affecting consumers even in Iowa, the top egg-producing state in the U.S., where farmers are limiting sales due to high demand and reduced supply.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Severe US Flu Season", "DESCRIPTION": "Dr. Jon LaPook discusses the severity of the current flu season, noting high case numbers of H3N2 and H1N1 strains. In some states, flu deaths are now outpacing COVID-19 deaths, exacerbated by low vaccination rates. Dr. LaPook urges people to get vaccinated as the season may last until May.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Violence in West Bank Amid Gaza Truce", "DESCRIPTION": "Despite a fragile cease-fire in Gaza, Israeli military operations have intensified in the West Bank town of Jenin, targeting what Israel deems terrorist infrastructure. The report highlights the resulting civilian casualties, including the death of a 2-year-old girl, and growing fears among Palestinians of being forcibly displaced.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "US Winter Weather Forecast", "DESCRIPTION": "Meteorologist Lonnie Quinn reports on a winter storm system bringing snow to the South and Mid-Atlantic, including Kentucky and Washington D.C. A second storm is forecasted to bring snow to Chicago, while California faces a high risk of mudslides from heavy rain.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "National Security Threat from Chinese-Made Port Cranes", "DESCRIPTION": "An 'Eye on America' report details a congressional investigation into the security threat posed by cargo cranes manufactured by ZPMC, a Chinese state-owned company. These cranes, used in 80% of U.S. ports, could potentially be monitored, controlled remotely, or shut down by the Chinese government, posing a significant risk to the U.S. economy and military logistics.", "TYPE": "STORY"}
{"STORYID": 10, "TITLE": "Upcoming Report on Air Travel Safety Lessons", "DESCRIPTION": "A teaser for a future 'Eye on America' segment that will revisit a plane crash from 16 years ago to explore the safety lessons learned that have since made air travel safer.", "TYPE": "STORY"}
{"STORYID": 11, "TITLE": "Rare Sighting of Humpback Anglerfish", "DESCRIPTION": "Marine researchers off the Canary Islands have made an extremely rare surface-level sighting of a Humpback Anglerfish, a deep-sea creature also known as a 'Black Sea Monster'. This is the only known time the fish has been observed on the ocean's surface.", "TYPE": "STORY"}

Gemini 2.5 Flash Thinking Mode (05-20)  also matches the Vanderbilt segmentation and exactly matches Gemini Pro's segmentation:

{"STORYID": 1, "TITLE": "DIY Foaming Soap", "DESCRIPTION": "A segment demonstrating how to make your own foaming hand soap at home using a standard soap dispenser and liquid soap, highlighting cost savings.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Post-Pandemic Education Recovery & Absences", "DESCRIPTION": "A report on the ongoing crisis in American education, highlighting troubling national test results showing students are still behind pre-pandemic levels in reading and math, widespread absenteeism, and bright spots like D.C.'s recovery efforts through high-impact tutoring and cell phone bans.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "American Teacher Marc Fogel Released by Russia", "DESCRIPTION": "News about the release of Marc Fogel, an American teacher held in Russia for nearly four years on medical marijuana possession charges.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Elon Musk's Government Waste & Fraud Efforts", "DESCRIPTION": "A brief update on billionaire Elon Musk's efforts to identify fraud and waste within the U.S. federal government's Treasury system, though no specific examples of crime or corruption were shared.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Avian Flu Impact on Egg Supply", "DESCRIPTION": "A report on the nationwide avian flu outbreak causing eggs to become a hot commodity, even in the U.S. egg-producing capital of Iowa, leading to limited sales.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Current Flu Season Overview", "DESCRIPTION": "An interview with Dr. Jon LaPook discussing the current flu season, including prevalent strains (H3N2, H1N1), vaccination rates, and the alarming trend of flu deaths surpassing COVID-19 deaths in many states.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Israel-Hamas Conflict: West Bank Violence & Hostage Delays", "DESCRIPTION": "A report on the fragile Mideast cease-fire, Hamas's delay in releasing hostages, President Trump's proposed plan for Gaza and the West Bank, and the escalating military operations and violence in the West Bank town of Jenin, including civilian casualties.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Winter Storms Across the U.S.", "DESCRIPTION": "A weather forecast detailing a winter storm affecting Kentucky and Washington D.C., an upcoming snow system for Chicago, rain affecting New England ski resorts, and a significant rain event heading to California with a high risk of mudslides.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "U.S. Port Security Threat from Chinese Cranes", "DESCRIPTION": "An \"Eye on America\" investigative report on the national security threat posed by Chinese-made cranes at U.S. ports, highlighting their vulnerability to hacking, potential for remote control by the Chinese government, and the economic and military implications of a shutdown.", "TYPE": "STORY"}
{"STORYID": 10, "TITLE": "Air Travel Safety Lessons from Past Crashes", "DESCRIPTION": "A preview of an upcoming \"Eye on America\" segment focusing on a plane crash 16 years ago and how lessons learned from it have contributed to making air travel safer today.", "TYPE": "STORY"}
{"STORYID": 11, "TITLE": "Rare Humpback Angler Fish Sighting", "DESCRIPTION": "A \"Creature Feature\" segment showcasing the first-ever known surface sighting of a rare deep-sea creature, the Humpback Angler Fish (Black Sea Monster), off the Canary Islands.", "TYPE": "STORY"}

The first time we ran Gemini 2.5 Flash Non-Thinking Mode (05-20)  failed to properly segment the transcript into stories. Run a second time, it closely matches the Vanderbilt and Gemini Thinking segmentations, but failed to properly annotate the transcript itself:

{"STORYID": 1, "TITLE": "American Education Crisis: The Struggle to Read Post-Pandemic", "DESCRIPTION": "A troubling report highlights an ongoing crisis in American education, showing that five years after the COVID-19 pandemic, many students are still significantly behind in reading and math. The story explores the reasons for this, including widespread absenteeism, and highlights areas where schools are finding success in recovery.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Teacher Released by Russia", "DESCRIPTION": "Russia released an American teacher, Marc Fogel of Pennsylvania, who had been held for nearly four years for possession of medical marijuana. The US President stated that Russia did not receive much in return for his release.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Elon Musk's Federal Waste Investigation", "DESCRIPTION": "Billionaire Elon Musk has been investigating fraud and waste within the federal government, specifically looking at the Treasury system. Despite a meeting with the President, no specific examples of crime or corruption were publicly identified.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Avian Flu and Egg Shortage", "DESCRIPTION": "A nationwide avian flu outbreak has made eggs a highly sought-after commodity, even in Iowa, a major egg-producing state. A former farmer discusses limiting egg sales due to hens being unable to meet demand.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Flu Season Update: High Cases and Low Vaccination Rates", "DESCRIPTION": "An update on the current flu season, noting a high number of cases with two prevalent strains (H3N2 and H1N1) covered by this year's vaccine. Concerns are raised about potential mutations and low adult vaccination rates, with flu deaths now surpassing COVID deaths in many states.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Fragile Peace in Gaza and West Bank Tensions", "DESCRIPTION": "The Mideast ceasefire remains fragile, with Israel threatening to resume war after Hamas delayed hostage releases. The story also covers heightened Israeli military operations in the West Bank, particularly Jenin, leading to fears among Palestinians of forced displacement, and discusses President Trump's development proposal.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Winter Storms Across the US", "DESCRIPTION": "A report on current and upcoming winter weather, including snow in Kentucky and Washington D.C., and a significant snow system heading towards Chicago. It also covers heavy rain and mudslide risks for Southern California.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Chinese-Made Cranes at US Ports: National Security Threat?", "DESCRIPTION": "A congressional investigation raises national security concerns about Chinese-made cranes at US ports, which handle a significant portion of the nation's imports. These cranes, built by a Chinese state-owned military contractor, are vulnerable to hacking and could potentially disrupt the US supply chain and military logistics. The Biden administration is committing funds to upgrade port security and replace these cranes, with the Trump administration also advocating for American-made equipment.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Rare Deep-Sea Fish Sighting: Humpback Angler Fish", "DESCRIPTION": "Marine researchers off the Canary Islands made a rare sighting of a humpback angler fish, also known as a black sea monster, on the ocean surface. This is the only known sighting of this deep-sea creature, which usually lives thousands of feet below, on the surface.", "TYPE": "STORY"}

Next we'll examine the February 12th, 2025 CBS Evening News broadcast. You can compare the results below with the Vanderbilt Television News Archive's hand-compiled story segmentation for this broadcast.

Gemini 2.5 Pro (06-05) opens as usual with the tail end of the previous broadcast. As with the previous broadcast, it breaks out the Guantanamo Bay story into its own story, whereas Vanderbilt lumps under the "Snow Blast Expected Across US" roundup. Whereas Vanderbilt breaks the two national weather stories into separate segments, Gemini recognizes that they are covering the same broad stories and thus groups them together:

{"STORYID": 1, "TITLE": "Lifestyle Tip: How to Fold a Jacket for Travel", "DESCRIPTION": "A demonstration is given on how to fold a structured jacket to fit compactly into a suitcase without wrinkling, allowing for easier travel.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "President Trump Initiates Negotiations to End Ukraine War", "DESCRIPTION": "President Trump holds phone calls with Russian President Vladimir Putin and Ukrainian President Zelenskyy to start negotiations to end the war. The plan includes an in-person meeting with Putin, a policy reversal on Ukraine's NATO membership and pre-2014 borders, and follows the release of American hostage Marc Fogel from Russia.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Severe Weather Hits U.S. with Snow, Tornadoes, and Mudslides", "DESCRIPTION": "A major weather system is bringing a blast of snow to the Central U.S. and Northeast, a significant threat of tornadoes to the South, and a high risk of flash flooding and mudslides to fire-scarred areas in Southern California.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Migrant Detainees Sent to Guantanamo Bay Facility", "DESCRIPTION": "The Department of Homeland Security confirms that nonviolent, low-risk migrant detainees are being sent to a new detention facility at Guantanamo Bay, Cuba, contrary to President Trump's previous statements that the facility would house \"worst migrants with criminal records.\"", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Inflation Persists, Causing Soaring Egg Prices and Shortages", "DESCRIPTION": "The Federal Reserve is expected to pause interest rate cuts as inflation rose to 3%, driven by costs like groceries. A significant factor is the soaring price and scarcity of eggs, caused by a major bird flu outbreak that has decimated hen populations, leading to long waits and rationing for consumers.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Trump Administration Purges Federal Inspectors General", "DESCRIPTION": "The Trump administration has fired numerous federal inspectors general, who are government watchdogs responsible for uncovering misconduct and safety failures. Critics, including fired VA Inspector General Michael Missal, argue the move is political retaliation that endangers public safety and undermines government independence.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Eye on America: 16th Anniversary of Colgan Air Crash and Its Legacy on Airline Safety", "DESCRIPTION": "A look back at the 2009 Colgan Air Flight 3407 crash near Buffalo, NY, which killed 50 people. The segment highlights the efforts of the victims' families who lobbied for and passed major federal airline safety reforms, including increased flight training hours for pilots.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "White House and Associated Press Clash Over 'Gulf of America' Name Change", "DESCRIPTION": "The Trump administration has ordered the Gulf of Mexico to be renamed the Gulf of America and barred an Associated Press reporter from an event after the news agency refused to adopt the new name in its reporting, citing journalistic standards and global audience needs. The AP protests the ban as a violation of the First Amendment.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Evening News Plus Teaser: President Trump and the Economy", "DESCRIPTION": "A teaser for the streaming show \"CBS Evening News Plus\" mentions a story on President Trump's vow to lower prices and a recent Labor Department report.", "TYPE": "STORY"}

Gemini 2.5 Flash Thinking Mode (05-20)  also matches the Vanderbilt and Gemini Pro's segmentations, but breaks the Gaza preview into its own entry:

{"STORYID": 1, "TITLE": "Trump's Ukraine Peace Initiative", "DESCRIPTION": "President Trump initiates negotiations to end the war in Ukraine, calling Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy, proposing an in-person meeting, and potentially reversing long-standing U.S. policies on Ukraine's NATO membership and territorial integrity. The release of American hostage Marc Fogel from Russia is also discussed in relation to these talks.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "National Weather Hazards", "DESCRIPTION": "A report on various severe weather events across the U.S., including snow in the Central and Northeast regions, a threat of tornadoes in the South, and the risk of flash flooding and mudslides in fire-scarred areas of Southern California.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Migrant Detainees Sent to Guantanamo Bay", "DESCRIPTION": "The Department of Homeland Security confirms that non-violent, low-risk migrant detainees are being sent to a new immigration detention facility at Guantanamo Bay, Cuba, a move that contrasts with President Trump's previous statements about the facility's intended occupants.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Rising Inflation and Egg Shortage", "DESCRIPTION": "The Labor Department reports a tick-up in inflation, largely driven by rising costs of groceries, gasoline, and rent, with a particular focus on the severe shortage and soaring prices of eggs due to the impact of bird flu on commercial chicken farms.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Purge of Federal Watchdog Inspectors", "DESCRIPTION": "The Trump administration's firing of more than a dozen federal Inspectors General (IGs), leading to a lawsuit arguing political motivations and concerns that it jeopardizes oversight and safety in areas like veterans' hospitals, food, and highways.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Airline Safety Improvements Post-Colgan Air Crash", "DESCRIPTION": "An 'Eye on America' segment reflecting on the 2009 Colgan Air Flight 3407 crash and the subsequent advocacy by victims' families that led to significant federal airline safety reforms, including mandated pilot flight hours, a pilot performance database, and rest requirements, and the ongoing efforts to defend these regulations against industry attempts to roll them back.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Trump's Attempt to Rename Gulf of Mexico and AP Dispute", "DESCRIPTION": "President Trump orders the Gulf of Mexico to be renamed the 'Gulf of America,' leading to a dispute with The Associated Press, which refuses to adopt the change for global audience recognition, resulting in an AP reporter being barred from an Oval Office event and raising First Amendment concerns.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Trump's Gaza Plan (Preview)", "DESCRIPTION": "A brief mention of President Trump's proposal to seize Gaza and force Palestinians out, highlighted as a significant foreign policy move and previewed as a topic for an upcoming 'Eye on America' segment.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Trump's Vow to Lower Prices (Tease)", "DESCRIPTION": "A very brief, cut-off mention of President Trump's campaign vow to lower prices, followed by a reference to a Labor Department report, possibly setting up a future discussion or continuation of the inflation story.", "TYPE": "STORY"}

The first time we ran Gemini 2.5 Flash Non-Thinking Mode (05-20)  overall matches Vanderbilt and Gemini Thinking:

{"STORYID": 1, "TITLE": "Trump's Ukraine Peace Initiative and Hostage Exchange", "DESCRIPTION": "President Trump initiates negotiations to end the war in Ukraine, speaking with both Russian President Putin and Ukrainian President Zelenskyy. This move represents a significant shift in U.S. policy and is accompanied by the release of an American hostage from Russia in exchange for a Russian cybercriminal. The story also covers the U.S.'s altered stance on NATO membership for Ukraine and the potential cession of Ukrainian territory.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Winter Weather and Natural Disaster Outlook", "DESCRIPTION": "A forecast of a major winter storm across the Central U.S. to the Northeast, including snow and potential tornadoes in the South. Additionally, there is a threat of mudslides in the West due to heavy rain on fire-scarred land.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Immigration Detention at Guantanamo Bay", "DESCRIPTION": "The Department of Homeland Security confirms that nonviolent, low-risk migrant detainees are being sent to the new immigration detention facility at Guantanamo Bay, Cuba, despite President Trump's previous statements that it would house 'worst migrants with criminal records'.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Rising Inflation and Egg Shortage", "DESCRIPTION": "Inflation has ticked up to 3% due to rising costs of groceries, gasoline, and rent, with a particular focus on the scarcity and soaring prices of eggs. The story explores the impact of bird flu on chicken populations and the challenges of replenishing egg supplies.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Purge of Federal Watchdogs and Inspectors General", "DESCRIPTION": "The Trump administration is firing and replacing federal watchdogs and Inspectors General, drawing criticism that this purge could compromise the safety of various public services, including food, highways, and veterans' hospitals. A lawsuit has been filed by some of the fired officials.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Airline Safety and the Legacy of Flight 3407", "DESCRIPTION": "Examining the impact of the 2009 Colgan Air Flight 3407 crash near Buffalo, which was the last fatal commercial airliner crash in the U.S. before a recent mid-air collision. The story highlights how victims' families lobbied for and achieved significant changes in federal airline safety regulations, including increased pilot training hours and rest requirements.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Trump's Order to Rename the Gulf of Mexico and AP's Response", "DESCRIPTION": "President Trump orders the Gulf of Mexico to be renamed the 'Gulf of America,' leading to a dispute with The Associated Press (AP). The AP refuses to follow the order, citing its global audience and standards, resulting in an AP reporter being barred from a White House event. The story touches on press freedom and governmental influence on journalistic standards.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Trump's Pledge to Lower Prices", "DESCRIPTION": "A brief mention of President Trump's campaign promise to lower prices on 'Day One' and the current reality on 'Day 23' as reported by the Labor Department.", "TYPE": "STORY"}
{"STORYID": 0, "TITLE": "Generic Opening/Closing/Transition", "DESCRIPTION": "This is a placeholder for generic segments that are not part of any specific news story, such as opening announcements, transitional phrases, or concluding remarks.", "TYPE": "STORY"}

Next we'll examine the February 13th, 2025 CBS Evening News broadcast. You can compare the results below with the Vanderbilt Television News Archive's hand-compiled story segmentation for this broadcast.

Gemini 2.5 Pro (06-05) again matches Vanderbilt's segmentation precisely:

{"STORYID": 1, "TITLE": "US-Russia Peace Talks on Ukraine War", "DESCRIPTION": "President Trump's plan to hold talks with Russia to end the war in Ukraine sparks concern from Ukrainian and European officials, who feel excluded from the negotiations. The topic is set to dominate the Munich Security Conference.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "NYC Mayor Adams Case Controversy", "DESCRIPTION": "Three federal prosecutors, including the U.S. Attorney in Manhattan, resign in protest after the Justice Department allegedly ordered them to drop criminal charges against New York City Mayor Eric Adams.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Evening News Roundup", "DESCRIPTION": "A summary of top stories including a conflict over the extradition of a New York doctor in an abortion pill case, a multi-vehicle crash in Oregon due to weather, and an FBI investigation into a car attack in Germany.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Trump's New Tariff Plan", "DESCRIPTION": "A \"Money Watch\" report on President Trump's plan to increase tariffs on foreign goods, examining the potential impact on a U.S. manufacturer who sees both potential benefits and challenges.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "RFK Jr. Confirmed as HHS Secretary", "DESCRIPTION": "Robert F. Kennedy Jr. is confirmed as Secretary of Health and Human Services, with a report on the politically diverse \"Make America Healthy Again\" (MAHA) movement that supports him despite controversies over his views on vaccines.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "National Weather Forecast", "DESCRIPTION": "A weather report from Lonnie Quinn covering an atmospheric river causing rain and mudslide fears in California, recent tornadoes in Mississippi, and the upcoming forecast for Chicago and the Northeast.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Eye on America: Political Opposites Reunited", "DESCRIPTION": "A follow-up report on two men with opposing political views, a progressive liberal and a Trump supporter, who met on a rafting trip, examining their relationship and perspectives after the recent presidential election.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "New Hampshire Bakery Mural Lawsuit", "DESCRIPTION": "A bakery in Conway, New Hampshire, sues the town in federal court, claiming its free speech rights were violated when the town ordered the removal of a mural depicting baked goods, which the town deemed an oversized advertising sign.", "TYPE": "STORY"}

Gemini 2.5 Flash Thinking Mode (05-20)  failed the first time it ran with an internal error, but running a second time as-is also matches the Vanderbilt segmentation, even more closely than Pro's segmentation:

{"STORYID": 1, "TITLE": "Ukraine War Peace Talks", "DESCRIPTION": "Discussion of President Trump's plan for US-Russian talks to end the nearly three-year-old war in Ukraine, including Ukraine's reluctance, the context of the Munich Security Conference, and the humanitarian impact of the ongoing conflict.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "DOJ Intervention in NYC Mayor Eric Adams Case", "DESCRIPTION": "Report on the resignation of federal prosecutors in protest of the Justice Department's order to drop criminal charges against New York City Mayor Eric Adams, including allegations of a quid pro quo.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Louisiana-New York Abortion Pill Extradition Dispute", "DESCRIPTION": "News of Louisiana's extradition warrant for a New York City doctor who allegedly sent abortion pills into Louisiana, where abortion is banned, and New York's governor's refusal to extradite the doctor.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Oregon Interstate Crashes Due to Winter Weather", "DESCRIPTION": "Report on multiple car and truck crashes on a slippery stretch of I-84 east of Portland, Oregon, amidst widespread snow and rain hitting the West Coast.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Munich Car Attack Investigation", "DESCRIPTION": "Update on the FBI joining the investigation into an apparent car attack in Munich, Germany, that injured at least 30 people, involving an Afghan asylum-seeker.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Trump's Tariff Plan and Economic Impact", "DESCRIPTION": "Coverage of President Trump's plan to increase tariffs on foreign goods to match tax rates imposed on American goods, including a visit to a Pittsburgh manufacturer to assess the potential positive and negative impacts on domestic industries and consumer prices.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "\"Eye On America\" - Political Opposites Find Common Ground", "DESCRIPTION": "A revisit to two Americans, a progressive liberal and an enthusiastic Trump supporter, who previously met on a rafting trip to explore finding common ground despite deep political differences, now reflecting on the current political climate and their friendship.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "RFK Jr.'s HHS Appointment and \"Make America Healthy Again\" (MAHA) Movement", "DESCRIPTION": "Report on Robert F. Kennedy Jr.'s confirmation as Secretary of Health and Human Services, his controversial stance on vaccines, and the 'Make America Healthy Again' (MAHA) movement supporting his agenda for public health.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Southern California Atmospheric River & Mudslide Fears", "DESCRIPTION": "Weather forecast detailing an atmospheric river bringing heavy rain to Southern California, raising fears of mudslides in wildfire-scarred areas, and tracking the system's movement across the country.", "TYPE": "STORY"}
{"STORYID": 10, "TITLE": "New Hampshire Bakery Mural Dispute", "DESCRIPTION": "Story about an upcoming federal court trial in Conway, New Hampshire, involving Leavitt's Country Bakery and its rooftop mural, which the town deems an illegal advertising sign due to its size and depiction of bakery products.", "TYPE": "STORY"}

The first time we ran Gemini 2.5 Flash Non-Thinking Mode (05-20)  is nearly identical to Pro this time:

{"STORYID": 1, "TITLE": "Ukraine War and Peace Negotiations", "DESCRIPTION": "President Trump's plan to end the nearly 3-year-old war in Ukraine, including upcoming meetings with Russia and Ukraine's reluctance to join talks without a common position. Focuses on the diplomatic battle over who will negotiate the conflict's end and the implications of U.S. and European leaders feeling excluded from potential peace talks, as well as the ongoing violence in Ukraine.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "Federal Prosecutors Resign in Protest over NYC Mayor Eric Adams Case", "DESCRIPTION": "Three federal prosecutors, including the U.S. Attorney in Manhattan, have resigned in protest after the Justice Department ordered them to drop criminal charges against New York City Mayor Eric Adams. The mayor had been indicted for bribery, fraud, and soliciting contributions from foreign nationals, with allegations of a 'quid pro quo' involving cooperation with the Trump administration.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Evening News Roundup: Top Stories from Around the World", "DESCRIPTION": "A quick summary of other major news stories: a Louisiana extradition warrant for a New York doctor who sent abortion pills to Louisiana, refusal of extradition by New York's governor, upcoming TV interview with the prosecutor; multiple car crashes on I-84 in Oregon due to snow and rain; and an FBI investigation into a car attack in Munich, Germany, involving an Afghan asylum-seeker.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "President Trump's Global Trade War and Tariffs", "DESCRIPTION": "President Trump's plan to increase tariffs on foreign goods to match tax rates imposed by other countries on American goods. Examines the potential impact on domestic manufacturers like Accu Tracks Products in Pittsburgh, highlighting both the potential for increased business and the challenge of rising costs for key materials like aluminum and steel.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "RFK Jr. Confirmed as HHS Secretary and the MAHA Movement", "DESCRIPTION": "Robert F. Kennedy Jr.'s confirmation as Secretary of Health and Human Services, including the Senate vote breakdown. Highlights the 'Make America Healthy Again' (MAHA) movement, an unlikely coalition of parents who supported Kennedy due to his focus on chronic diseases, diet, and environmental toxins, despite his controversial stance on vaccine-autism links.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "Weather Report: Atmospheric River and Severe Storms", "DESCRIPTION": "Detailed weather forecast, focusing on an atmospheric river bringing heavy rain to Southern California, raising fears of mudslides in wildfire-scarred areas. Also covers the system's progression east, potentially bringing snow to Chicago and a mix of snow, rain, and ice to the Northeast, as well as recent tornado touchdowns in Mississippi and the risk of more severe weather.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Eye on America: Political Opposites and Friendship", "DESCRIPTION": "Revisits the story of Reverend Rodney Sadler (progressive liberal) and Lance Moseley (Trump supporter) who met on a rafting trip and found common ground despite their political differences. Explores how their friendship navigates the aftermath of the election and their differing views on the new presidency, highlighting the challenges and possibilities of maintaining relationships across deep political divides.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "New Hampshire Bakery Mural Lawsuit", "DESCRIPTION": "Describes the upcoming 'trial of the century' in Conway, New Hampshire, involving Leavitt's Country Bakery and a mural on its roof. The town considers the mural, which depicts bakery products, an advertising sign that exceeds size limits, while the bakery claims the restriction violates their freedom of speech, framing it as a civil rights case.", "TYPE": "STORY"}

Finally, we'll examine the February 14th, 2025 CBS Evening News broadcast. You can compare the results below with the Vanderbilt Television News Archive's hand-compiled story segmentation for this broadcast.

Gemini 2.5 Pro (06-05) as usual perfectly matches the Vanderbilt segmentation, while breaking out several key stories that Vanderbilt had lumped together:

{"STORYID": 1, "TITLE": "DOJ in Turmoil Over Adams Case", "DESCRIPTION": "Multiple federal prosecutors resign in protest over political pressure from the Trump administration to drop the corruption case against New York City Mayor Eric Adams, raising concerns about the independence of the Justice Department.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "VP Vance Addresses Munich Security Conference", "DESCRIPTION": "Vice President J.D. Vance delivers a controversial speech at the Munich Security Conference, lecturing European allies on internal values and downplaying the threat from Russia and China.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Investigation into Deadly Mid-Air Collision", "DESCRIPTION": "The NTSB reports that pilots of an Army helicopter in a deadly mid-air collision near Washington may have received bad altitude data and missed messages from air traffic control.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Trump Halts Funding for Schools with Vaccine Mandates", "DESCRIPTION": "President Trump signs an order to stop federal funding for schools that require COVID-19 vaccines, a move with limited immediate impact as most mandates have ended.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Interstate Conflict Over Abortion Medication", "DESCRIPTION": "A New York doctor is fined in Texas and faces criminal charges in Louisiana for mailing abortion pills, sparking a legal battle between the states over jurisdiction and abortion laws.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "US Deports Migrants to El Salvador Amid Prison Concerns", "DESCRIPTION": "The U.S. begins deporting migrants to Central American countries, including El Salvador, where a notorious prison has offered to house deportees, raising human rights concerns.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Storm System Threatens South with Flooding, Northeast with Ice", "DESCRIPTION": "Meteorologist Lonnie Quinn tracks a major storm system expected to cause significant flooding in the Tennessee Valley and bring a dangerous ice storm to parts of the Northeast.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Elderly Couple's Secret to a Happy Marriage", "DESCRIPTION": "A Valentine's Day story features a couple married for 68 years, whose nightly ritual of the husband singing to his wife is credited as the secret to their long, happy relationship.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "New Wave of Federal Government Layoffs", "DESCRIPTION": "A new wave of layoffs is occurring within the federal government.", "TYPE": "STORY"}
{"STORYID": 10, "TITLE": "New Non-Addictive Pain Medication", "DESCRIPTION": "A new medication has been developed that relieves pain without the risk of abuse or addiction.", "TYPE": "STORY"}

Gemini 2.5 Flash Thinking Mode (05-20)  also matches the Vanderbilt segmentation and exactly matches Gemini Pro's segmentation:

{"STORYID": 1, "TITLE": "Justice Department Under Scrutiny Over Eric Adams Case and Prosecutor Resignations", "DESCRIPTION": "A controversy within the Justice Department as federal prosecutors resign in protest over orders to drop criminal charges against New York City Mayor Eric Adams. The situation raises concerns about political influence on the integrity of the U.S. justice system, with comparisons drawn to the Nixon era. President Trump denies involvement, while the Justice Department makes a court filing to dismiss the case, awaiting a judge's decision.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "VP Vance's Controversial Speech at Munich Security Conference", "DESCRIPTION": "Vice President J.D. Vance's first major speech on the world stage at the Munich Security Conference draws attention for lecturing European politicians on free speech and immigration, downplaying the threat of U.S. adversaries, and meeting with far-right groups. His remarks are seen by some allies as an adversarial message, raising questions about U.S. national interests.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Investigation into Deadly Midair Collision Near Washington", "DESCRIPTION": "An update on the NTSB investigation into a fatal midair collision involving an Army helicopter near Washington. Initial findings suggest the helicopter pilots may not have heard air traffic control messages and the Black Hawk may have provided incorrect altitude data. Evidence also suggests the plane attempted evasive maneuvers.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "Trump Executive Order on Federal Funding for Schools and COVID Vaccine Mandates", "DESCRIPTION": "President Trump signs an executive order to cease federal funding for schools that require COVID-19 vaccines. The order is anticipated to have minimal impact, as most school vaccine mandates have already been rescinded.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Interstate Legal Battle Over Abortion Medication and Doctor Extradition", "DESCRIPTION": "A New York doctor faces a $100,000 fine in Texas and criminal charges in Louisiana for sending abortion medications to women in states where abortion is banned or restricted. This has sparked a high-profile dispute between the governors of New York and Louisiana, highlighting the legal complexities and potential for Supreme Court involvement in post-Roe v. Wade abortion laws.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "U.S. Deportation Policy and Conditions in Central American Prisons", "DESCRIPTION": "The United States begins deporting illegal African and Asian immigrants to prisons in Panama, Guatemala, and El Salvador, rather than their home countries. The report includes an exclusive look inside El Salvador's notorious CECOT prison, where conditions are harsh, raising human rights concerns for deportees, even those not convicted of violent crimes.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Severe Weather Alert: Flooding in South, Ice Storm in Northeast", "DESCRIPTION": "A comprehensive weather forecast warns of a powerful storm system bringing significant impacts across the U.S. The Northeast is bracing for a quarter-inch or more of ice, causing hazardous travel conditions, while portions of the Tennessee Valley face a '4 out of 4' flash flooding risk, with up to 9 inches of rain expected.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "Steve Hartman 'On the Road': The Secret to a Happy Marriage", "DESCRIPTION": "A Valentine's Day human interest story featuring Don and Marilyn Barnett, an elderly couple from Sioux Falls, South Dakota, who share their secret to 68 years of happy marriage: the husband serenading his wife with a song every night before bed.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "New Wave of Federal Government Layoffs Expected", "DESCRIPTION": "A brief mention of an upcoming report on a new wave of layoffs within the federal government.", "TYPE": "STORY"}
{"STORYID": 10, "TITLE": "New Medication for Pain Relief Without Addiction Risk", "DESCRIPTION": "A brief mention of an upcoming report on a new medication designed to relieve pain without the risk of abuse or addiction.", "TYPE": "STORY"}

Gemini 2.5 Flash Non-Thinking Mode (05-20)  yields a nearly identical segmentation, other than lumping the last two stories together:

{"STORYID": 1, "TITLE": "Justice Department Turmoil and Mayor Adams Case", "DESCRIPTION": "Federal prosecutors are resigning in protest over orders from Trump-aligned leaders within the Justice Department to dismiss criminal charges against New York City Mayor Eric Adams. Concerns are rising about the integrity of the justice system and potential presidential influence over prosecutions nationwide.", "TYPE": "STORY"}
{"STORYID": 2, "TITLE": "J.D. Vance's Speech at Munich Security Conference", "DESCRIPTION": "Vice President J.D. Vance delivered his first major speech on the world stage at the Munich Security Conference, where he lectured European politicians on free speech, immigration, and cooperation with the far-right, while downplaying the threat of the Russia-China alliance. His comments were seen by some European allies as describing them as adversaries.", "TYPE": "STORY"}
{"STORYID": 3, "TITLE": "Deadly Midair Collision Investigation", "DESCRIPTION": "The NTSB is investigating a deadly midair collision near Washington. Early findings suggest the Army helicopter pilots may not have heard air traffic control messages and the Black Hawk may have provided incorrect altitude data. Evidence also suggests the other plane attempted evasive maneuvers.", "TYPE": "STORY"}
{"STORYID": 4, "TITLE": "President Trump's Order on COVID Vaccine Mandates", "DESCRIPTION": "President Trump signed an order to stop federal funding for schools requiring COVID vaccines. The order is not expected to have significant impact as most of these mandates have already been dropped.", "TYPE": "STORY"}
{"STORYID": 5, "TITLE": "Texas Judge Fines NY Doctor for Abortion Medication; Extradition Dispute", "DESCRIPTION": "A Texas judge fined a New York doctor $100,000 for sending abortion medications to a woman in Texas, where most abortions are banned. The same doctor faces criminal charges in a similar case in Louisiana, leading to a legal dispute between the governors of Louisiana and New York regarding extradition and the enforcement of differing state laws on abortion.", "TYPE": "STORY"}
{"STORYID": 6, "TITLE": "U.S. Deportation of Migrants to Central America", "DESCRIPTION": "The United States has begun deporting Africans and Asians who are in the country illegally to Panama, Guatemala, and El Salvador, rather than to their home countries. El Salvador's president has offered to house deported criminals for a fee in his country's prisons, which are known for harsh conditions, raising human rights concerns.", "TYPE": "STORY"}
{"STORYID": 7, "TITLE": "Severe Weather Threats: Flooding in the South and Ice in the Northeast", "DESCRIPTION": "A storm system is threatening flash flooding in the Tennessee Valley, with predictions of up to 9 inches of rain. The same system is expected to bring significant icing to parts of the Northeast, including the Poconos and Southern Green Mountains, making travel difficult.", "TYPE": "STORY"}
{"STORYID": 8, "TITLE": "The Secret to a Long and Happy Marriage: The Barnetts' Nightly Serenade", "DESCRIPTION": "Don and Marilyn Barnett, a couple married for nearly seven decades in Sioux Falls, South Dakota, share their secret to a long and happy marriage: Don sings to Marilyn every night before bed. This ritual, which started 50 years ago, helps them resolve disagreements and strengthens their bond.", "TYPE": "STORY"}
{"STORYID": 9, "TITLE": "Federal Government Layoffs and New Pain Medication", "DESCRIPTION": "Upcoming details on a new wave of layoffs in the federal government and information about a new medication that relieves pain without the risk of abuse or addiction.", "TYPE": "STORY"}