US Orders Anthropic to Disable Fable 5 and Mythos 5

Anthropic has been forced to suspend Fable 5 and Mythos 5 worldwide after a US national security order. The restriction applies to all foreign nationals, including some Anthropic employees.

The company says the government cited a potential jailbreak method but provided limited details. Anthropic argues the reported capability is already available in other AI models and warns the move could slow future AI deployments.