A.I. 'Hallucinations' Created Errors in Court Filing, Top Law Firm Says [View all]

Source: NYT

An elite Wall Street law firm has apologized to a federal judge for submitting a court filing replete with errors created by artificial intelligence, including “hallucinations” that fabricated case citations.

The A.I.-generated errors came in a recent motion in U.S. Bankruptcy Court in Manhattan and were discovered by lawyers from an opposing firm, Andrew Dietderich, a partner at Sullivan & Cromwell, wrote in a letter to Judge Martin Glenn on April 18.

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The firm provided a ledger of the errors, which spanned three pages and totaled around three dozen. A number of them involved the citation of seemingly imagined passages from real cases. Some were clerical errors that the firm said were not A.I.-related.

Sullivan & Cromwell is one of the oldest and most prestigious law firms in the country. It is representing President Trump in several appeals, including his criminal conviction in 2024 in a case that stemmed from a hush-money payment to a porn star. Jay Clayton, now the U.S. attorney for the Southern District of New York, was of counsel and formerly a partner at the firm.

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Read more: https://www.nytimes.com/2026/04/21/nyregion/sullivan-cromwell-ai-hallucination.html