David Lat (Original Jurisdiction) has the story. A brief excerpt:
AI mistakes are no longer the province of the wantonly stupid. They can even be committed by leading litigators at famous firms.
The firm is Boies Schiller Flexner, "one of the most prestigious and profitable law firms in the nation. It's currently #55 in the Vault 100, the nation's 100 most prestigious law firms, and #118 in the Am Law 200, the country's 200 largest law firms based on revenue." Big firm lawyers (like all lawyers), take note.