The US government has ordered Anthropic to shut down global access to Fable 5 and Mythos 5, citing alleged jailbreak risks. Anthropic is complying but pushing back publicly: the vulnerabilities are minor and exist in competing models like GPT-5.5, the company says, an ironic turn after the company spent months hyping the cybersecurity risks of its own Mythos class. Anthropic warns the move could set a precedent that halts all frontier deployments.

Link to: https://www.anthropic.com/news/fable-mythos-access

The U.S. government ordered Anthropic to pull Fable 5 and Mythos 5 over national security concerns just days after its CEO called for exactly this kind of oversight.