According to LessWrong, the US Department of Commerce ordered Anthropic to shut down Fable 5 and Mythos 5 following national security concerns about an Amazon-identified jailbreak. The directive bans access to all foreign nationals, including Anthropic's international employees. Anthropic contests the severity, calling the vulnerabilities minor and non-universal, and warns that applying the same standard industry-wide would halt all new AI model deployments.

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