U.S. Orders Anthropic to Suspend Foreign Access to Fable 5 and Mythos 5 AI Models Over Jailbreak Risk

U.S. government ordered Anthropic to suspend access to its Fable 5 and Mythos 5 AI models for foreign nationals. The Commerce Department issued the export control directive on Friday. Anthropic said it received the directive without specific details of the national security concern.

The company stated that the government believes there is a method of bypassing or jailbreaking a safeguard that would prevent Fable 5 from being used in identifying software vulnerabilities. Anthropic said it had received only verbal evidence of a potential narrow, non-universal jailbreak. " Anthropic announced it will abruptly disable Fable 5 and Mythos 5 for all customers to ensure compliance.

Access to all other Anthropic models will not be affected by the directive. Anthropic said it believes there is a misunderstanding and is working to restore access to the models as soon as possible. The company had rolled out Claude Fable 5 earlier this week, representing a new tier of capability it calls Mythos-class.

IPO last month. U.S. oversight of AI, including the ability to block models with unacceptable risks.

U.S. military to use its AI models for domestic surveillance and fully autonomous weapons systems. The government responded by putting Anthropic on a supply chain blacklist set to take effect later in the year.

Pentagon chief information officer Kirsten Davies posted on X that the defense department supported prioritizing national security. "Some things are simply more important than revenue cycles, clickbait and pre-IPO valuation. America First.

Always," Davies stated. U.S. Export controls that focused on chips and tools rather than restricting foreign access to AI models themselves.