AI Hallucination Cases by State

960 U.S. court cases where attorneys were cited or sanctioned for filing AI-fabricated legal authority. 438 additional international cases are tracked separately (1,398 total).

Top 10 states by case count

  1. California — 94 cases
  2. New York — 63 cases
  3. Texas — 55 cases
  4. Florida — 47 cases
  5. Illinois — 42 cases
  6. Arizona — 32 cases
  7. Washington — 31 cases
  8. Michigan — 29 cases
  9. Indiana — 25 cases
  10. Nevada — 25 cases

Source: Charlotin hallucination-case database.