Anthropic says it has cut illicit distillation of Claude by more than 90%

Anthropic published "Strengthening our defenses against distillation attacks" on Oct 12, 2026, on its news and research pages. Anthropic says illicit distillation lets model developers copy frontier capabilities without building proportionally robust safeguards, and that the measures it describes have reduced the rate of distillation by more than 90%. The figure is Anthropic's own claim.