US Orders Anthropic to Block Claude Fable 5 Globally

The US government issued an emergency export control directive ordering Anthropic to suspend all access to Claude Fable 5 and Mythos 5, citing national security concerns. Anthropic complied by blocking both models globally, affecting all users including paying enterprise customers, just three days after their public launch. Existing sessions are now returning errors, with queries rerouted to older models like Opus 4.8. Anthropic says it believes the action is a misunderstanding and is working to restore access, while the incident highlights serious risks for enterprises relying on centralized cloud-based AI services.