A California judge has imposed $31,000 in sanctions on two law firms for using AI-generated content in legal briefs without disclosing its use. The ruling, submitted last week, followed the judge’s discovery of numerous false, inaccurate, and misleading legal citations and quotations in a supplemental brief. Judge Michael Wilner criticized attorneys for relying on AI to conduct legal research, stating that ‘no reasonably competent attorney should out-source research and writing’ to AI. The judge emphasized that the false citations could have led to significant legal errors, highlighting the potential risks of AI in the legal profession.