Anthropic tells Senate that Alibaba ran 28.8 million Claude queries through 25,000 fake accounts in the largest known AI distillation attack
Anthropic submitted a formal letter to the Senate Banking Committee accusing Alibaba of running an industrial-scale model-distillation campaign against Claude from April 22 to June 5, 2026, generating 28.8 million unauthorized exchanges through roughly 25,000 fraudulent accounts.