Sullivan & Cromwell Legal Snafu Shreds AI’s Hype: Gautam Mukunda

April 23, 2026, 11:30 AM UTC

A few days ago, the law firm Sullivan & Cromwell LLP apologized to the chief judge of Manhattan’s US Bankruptcy Court for a court filing with AI-hallucinated citations. Andrew Dietderich, co-head of the firm’s global restructuring group, wrote the judge that the firm’s “comprehensive policies and training requirements governing the use of AI tools” had not been followed. A secondary review process also failed. A database of similar incidents that had around 90 entries a year ago now has 1,333. Many are from pro se litigants and small-firm practitioners. Now add one of America’s leading firms.

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