Anthropic Pulls Mythos AI Globally After US Directive

Anthropic has globally disabled access to its two most advanced AI models, Claude Fable 5 and Claude Mythos 5, following a US government directive. The government cited national security concerns for the immediate action. Anthropic confirmed the move but disagrees with the assessment. The order requires the company to disable both models for all users worldwide. Mythos, Anthropic's most advanced AI, was restricted to a handful of vetted organizations. It is known for its ability to identify security vulnerabilities in software. Fable 5 is a version of Mythos with guardrails. The government expressed concerns over a potential jailbreak in Fable 5. Anthropic stated it has only seen verbal evidence of a "potential narrow, non-universal jailbreak." Anthropic argues the capability is widely available in other models and used for defensive cybersecurity. The company's strongest safeguards work through independent classifier systems. This incident could impact Anthropic's plans for an IPO this year.