New Delhi : Anthropic said on Friday it will “abruptly disable” its most advanced AI models for all users after the US government ordered it to suspend access to the models for foreign nationals. It is Anthropic’s understanding 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, the company said.
Anthropic’s relationship with the government ruptured this year after it refused to allow the US 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. The action also marks a major escalation of US efforts to halt foreign adversaries’ AI capabilities.
The government directive and Anthropic’s response highlight growing tension between AI developers and regulators over how to assess risks from so-called “jailbreaks,” or methods used to bypass model safeguards. As recently as Wednesday, Anthropic had called for greater US oversight of AI, including the ability to block models with unacceptable risks. Experts have said that Mythos models, in the wrong hands, could dramatically accelerate sophisticated cyberattacks, particularly in sectors such as banking that rely on complex, interconnected, and often decades-old technology systems.
Amazon’s cloud unit AWS said late on Friday that Anthropic has asked it to revoke access to the models for “all users in all regions. A US official confirmed that the Commerce Department had issued an export control directive to suspend all access to Fable 5 and Mythos 5 by foreign nationals. Dean Ball, a former White House official who contributed to the AI Action Plan the administration issued in the summer of 2025, said in a post on X that the order suggests all “non-Americans” would be restricted from using Anthropic’s latest models, including those based in the US.
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