US government restricts Anthropic's Fable and Mythos models to US users only following jailbreak vulnerability
Security issue Provisional 72% confidence first seen
The U.S. government issued an export control order preventing Anthropic from offering its Fable and Mythos models to non-US citizens and foreign users after researchers discovered a jailbreak vulnerability in the system. Amazon, which had invested $5 billion in Anthropic, alerted the Commerce Department to the security issue, prompting the restrictions. The incident marks a significant precedent for direct government intervention in frontier AI model deployments.
Anthropic
Claude 5 Fable
Claude 5 Mythos
Claude 5 Mythos/Fable
Claude Fable
Amazon
Commerce Department
Fable
Mythos
U.S. executive branch
Washington