TechFlow reports that on June 13, according to an official statement by Anthropic, the U.S. government issued an export control order on June 11 local time, citing national security concerns, requiring the suspension of access to Fable 5 and Mythos 5 for all foreign nationals. As a result, Anthropic was forced to disable both models for all users. The government claims to have identified a “jailbreak” method capable of bypassing Fable 5’s safeguards; however, after internal review, Anthropic stated that the reported vulnerability is relatively minor and that comparable capabilities exist in other publicly available models—such as OpenAI’s GPT-5.5—and therefore do not represent a unique risk specific to Mythos. Anthropic affirmed its commitment to comply with the government’s directive but explicitly opposed removing commercially deployed models—already serving hundreds of millions of users—based solely on the discovery of a narrow-scope jailbreak. The company warned that if this standard were broadly adopted across the industry, it would effectively halt all new deployments of frontier AI models. Anthropic is currently engaged in active discussions with government authorities to seek a prompt restoration of access.
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