Last year saw a rapid surge in court sanctions against lawyers for AI-generated briefs containing fictitious citations, and the rate is still climbing — a researcher tracking the trend recorded 10 cases from 10 different courts in a single day.A federal court may have set a new record last month with an order for an Oregon lawyer to pay $109,700 in sanctions for filing AI-generated errors, while Nebraska and Georgia supreme courts held public hearings over hallucinated case citations.OpenAI was sued in March by Nippon Life Insurance Company of America, which alleged a woman was using ChatGPT as a legal adviser, producing frivolous lawsuits — a charge OpenAI called meritless.