Anthropic says Alibaba orchestrated largest known attack on its Claude AI models (opens original article in a new tab)

Anthropic accused Alibaba of conducting the largest known attack on its Claude AI models using fraudulent accounts, claiming the effort aimed to extract advanced capabilities for China's AI development, while US authorities restricted access to Anthropic's models over security concerns.

• Anthropic accused Alibaba of using 25,000 fraudulent accounts to extract Claude AI model capabilities between April 22 and June 5, 2026
• Anthropic described Alibaba's actions as a 'distillation' effort to accelerate China's access to advanced AI capabilities
• US Commerce Department restricted access to Anthropic's Mythos and Fable AI models due to military use concerns