Intel Hub
AI Hallucination News & Analysis
Sanctions cases, research findings, and regulatory developments on AI hallucination across legal, pharma, insurance, and enterprise. Updated weekly with original Cairnic analysis.
K&L Gates attorneys sanctioned $31,100 for AI-hallucinated brief
Attorneys submitted a brief containing 9 of 27 incorrect citations, including two entirely fabricated cases. Tools used: CoCounsel, Westlaw Precision, Google Gemini. A corrected version still contained six errors.
$31,100 sanctions · 9 of 27 citations incorrect
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Stanford: Legal AI tools hallucinate 17–33% of the time
Stanford RegLab tested Lexis+ AI and Westlaw AI-Assisted Research — both marketed as "hallucination-free." Lexis+ AI hallucinated 17%+ of the time. Westlaw hallucinated 34%+. Two types identified: fabricated citations and misgrounded citations.
Lexis+ AI: 17%+ · Westlaw: 34%+ hallucination rate
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1,247+ AI hallucination cases documented globally
Damien Charlotin's AI Hallucination Cases Database tracks over 1,247 legal decisions involving AI-generated hallucinated content. 90% involve solo practices or small firms. 56% involve plaintiff's counsel.
1,247+ cases · 90% small firms · adding cases weekly
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Denver attorney suspended 90 days for ChatGPT-fabricated citations
A Denver attorney accepted a 90-day suspension from the Colorado Supreme Court after a disciplinary investigation found he used ChatGPT to draft a motion containing fabricated citations — then denied using AI until text messages proved otherwise.
90-day suspension · denied AI use before evidence surfaced
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12 of 19 citations fabricated in Arizona Social Security appeal
An attorney filed a Social Security disability appeal containing 12 fabricated citations out of 19 — each with a real case number and real judge initials. Judge Alison Bachus described the brief as "replete with citation-related deficiencies consistent with artificial intelligence generated hallucinations."
12 of 19 citations fabricated · real judge initials on fake cases
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