Anthropic confirmed that the US government issued an export control directive requiring them to suspend all access to Fable 5 and Mythos 5 models for foreign nationals worldwide. The company received the directive at 5:21 PM ET on Friday and had to disable these models entirely to ensure compliance.

The government cited national security concerns related to a potential jailbreak method. Anthropic reviewed demonstrations showing the technique could identify minor vulnerabilities already known to researchers, noting that other models like GPT-5.5 can discover similar issues without bypass techniques. The company disagrees that these findings warrant removing a commercial model used by hundreds of millions.

The timing raises questions about political motivations. The Trump administration previously declared Anthropic a supply chain risk despite continued military use of their models. With competitors like OpenAI having administration connections, this ban arrives as Anthropic prepares for IPO, creating suspicious optics.

This sets a troubling precedent where regulatory actions may serve political purposes rather than genuine security needs, undermining trust in both AI development and democratic oversight of emerging technologies.