US government directs Anthropic to shut down Fable 5 and Mythos 5

The US government ordered Anthropic to suspend Fable 5 and Mythos 5 for all customers, citing a potential jailbreak method. Anthropic received the directive on June 13, 2026, and disputes the claim, saying the vulnerabilities are minor and found by other models without bypass. Access to other Anthropic models remains unaffected.