AI Legal Case Tracker

Yale AI Cheating Dispute Becomes 13-Count Federal Lawsuit

A Yale Executive MBA student sued the university after an AI-detection tool (GPTZero) flagged his final exam as AI-generated, leading to a one-year suspension and a failing grade. The suit — running since February 2025 across 125 docket entries — now contains 13 federal causes of action including breach of contract, civil rights violations, defamation, and invasion of privacy. The plaintiff alleges GPTZero's known bias against non-native English speakers produced a false positive and that the disciplinary process was politically motivated.

MeetingTV Defamation Case Against Palo Alto Network, Koi, et al

The legal complaint filed against Koi Security (now owned by Palo Alto Networks), its researchers, and Palo Alto Networks alleges that Koi used an LLM to generate the threat report, the AI system hallucinated findings about MeetingTV, and the security shop then published those as facts in a December 30 blog. Accuses Koi (now Palo Alto Networks) of “reckless publication of an AI-driven cybersecurity report that falsely accused Plaintiff MeetingTV Inc. of criminal conduct including operating core infrastructure for a well-funded Chinese criminal organization running a large-scale malware and corporate espionage campaign, being a "front" for a chinese cybercriminals.

Activist Robby Starbuck files $15M defamation lawsuit against Google over AI hallucinations

Conservative activist and filmmaker Robby Starbuck sued Google LLC in the Delaware Superior Court, alleging that Google's AI chatbots — including Bard, Gemini, and Gemma — repeatedly generated "outrageously false" and defamatory information about him. The AI fabricated claims linking Starbuck to sexual assault allegations and other falsehoods, reportedly shown to nearly 3 million unique users. Starbuck seeks at least $15 million in damages, accusing Google of negligence and actual malice for spreading "radioactive lies" through its AI products. A Delaware judge allowed the case to proceed, refusing to let Google dismiss the claims as mere AI "hallucinations," potentially setting a precedent for AI liability.

Pastor files lawsuit against OpenAI after ChatGPT medical advice nearly caused fatal embolism

Scott Winters, a 55-year-old Florida pastor, sued OpenAI (alongside OpenAI OpCo, Sam Altman, and other employees/investors) after ChatGPT-4o allegedly gave him inaccurate medical advice that led to delayed care for a potentially fatal pulmonary embolism. Winters exchanged hundreds of messages with the chatbot about recurring dizzy spells and blood pressure instability; ChatGPT repeatedly told him to stay at home and rest, assuring him he did not need immediate care. Weeks later he suffered a pulmonary embolism that 'brought him to the brink of death.' Even hours before the incident, the chatbot continued reassuring him he was not in serious danger. Winters is demanding a jury trial, damages, and injunctive relief.

Lawyer sanctioned $5,000 after ChatGPT fabricated fake case citations in Mata v. Avianca

In the landmark AI hallucination legal case, New York lawyer Steven A. Schwartz of Levidow, Levidow & Oberman submitted a court filing in Mata v. Avianca that cited multiple non-existent judicial opinions fabricated by ChatGPT, complete with fake quotes, citations, and docket numbers. Schwartz later testified he believed ChatGPT was a 'super search engine' and could not fathom it would invent cases. Judge P. Kevin Castel of the Southern District of New York sanctioned Schwartz and his firm $5,000 and issued a public reprimand, finding they 'abandoned their responsibilities' and acted in bad faith. The case became the first widely publicized instance of AI hallucinations corrupting court filings and triggered a wave of judicial orders nationwide warning lawyers to verify AI-generated citations.

Australian mayor readies world's first ChatGPT defamation lawsuit over false bribery claims

Brian Hood, mayor of Hepburn Shire in Victoria, Australia, prepared what was billed as the world's first defamation lawsuit over an AI hallucination after ChatGPT falsely told users he had served time in prison for bribery linked to the early-2000s Note Printing Australia scandal. In reality, Hood had been a whistleblower who helped expose the scandal and was never convicted. Hood's legal team sent OpenAI a legal concerns notice demanding it correct the false output or face suit, highlighting that ChatGPT presented the fabricated bribery conviction as established fact. The case marked the first time a public figure pursued defamation claims over generative AI output and set early precedent on AI publishers' liability for hallucinated biographical claims.

MyPillow CEO Mike Lindell's lawyers fined $3,000 each over AI-hallucinated case citations

U.S. District Judge Nina Y. Wang of the District of Colorado fined two attorneys representing MyPillow CEO Mike Lindell $3,000 each after they filed a motion in a defamation case riddled with AI-generated mistakes and citations to cases that did not exist. The judge found the filing contained 'a host of mistakes' and fictitious case law consistent with artificial-intelligence hallucinations, and held that the monetary sanctions were 'the least severe sanction adequate to deter and punish defense counsel.' The case is part of a growing wave of courts sanctioning lawyers who submit unverified, AI-fabricated legal authority.

Sullivan & Cromwell apologizes to federal judge after AI hallucinations riddle court filing

Elite Wall Street law firm Sullivan & Cromwell apologized to a federal bankruptcy judge in April 2026 after submitting an emergency court motion containing dozens of fabricated case citations and other errors generated by artificial intelligence. The firm acknowledged that AI tools produced non-existent authorities that its lawyers failed to verify before filing, prompting the court and the legal profession to renew scrutiny of BigLaw AI-usage safeguards. The incident is among the highest-profile examples of a top-tier firm's work product being corrupted by AI hallucinations and has been cited in ongoing debates over mandatory AI-citation verification rules.