US Gov Pulls Plug on Anthropic's Claude AI Models

The U.S. government has ordered Anthropic to immediately shut down access to two of its most powerful AI models, Claude Fable 5 and Claude Mythos 5. This directive cites national security concerns. Anthropic announced its compliance but expressed disagreement with the decision. The order requires disabling both models for all users worldwide. Mythos is Anthropic’s most capable AI model, known for finding security vulnerabilities. Fable 5, released recently, was designed with safeguards for general use and was considered the most capable AI model available to the public. The government's directive is framed as an export control action. However, Anthropic believes the underlying concern is a claimed "jailbreak" of Fable 5. Anthropic argues that the described jailbreak involves prompting the model to identify software flaws, a capability already available in other public models and routinely used by cybersecurity professionals for defensive purposes. This matters because it highlights the ongoing tension between AI development and national security concerns, impacting access to advanced AI tools.