The Pentagon’s chief information officer, Kirsten Davies, said in a post 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 said. Anthropic confidentially filed for a US IPO last month, edging ahead of rival OpenAI in the race to reach public markets. Sophisticated cyberattacks Earlier this week, Anthropic rolled out an AI model named Claude Fable 5, representing a new tier of capability it calls “Mythos-class.” The
model is accompanied by guardrails barring its use in risky areas such as cybersecurity, which some users have complained are “overly broad,” Anthropic said. 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. Anthropic said it had worked with the US government, among others, on safety ahead of the Fable launch and that models from rival AI providers showed a similar ability to
unearth minor bugs in code. “The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Anthropic models will not be affected,” Anthropic said. Read moreWhat the Palantir CEO’s ‘manifesto’ tells us about the changing face of war Anthropic said that it believed there was a “misunderstanding” and that it is working to restore access to the models as soon as possible. “If this standard was applied across
the industry, we believe it would essentially halt all new model deployments for all frontier model providers,” the company said. 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 “This means you should expect to have to prove your citizenship to use Anthropic models,” Ball said. Several key Anthropic personnel, including co-founder Chris Olah, AI researcher Andrej Karpathy and philosopher Amanda Askell, were born outside the United States. Reuters was unable to determine their citizenship status, and an Anthropic
spokesperson declined to comment on whether such staff would lose AI model access. (FRANCE 24 with Reuters)
Anthropic, Claude Fable 5, Mythos 5, export control directive, AWS, Kirsten Davies, Pentagon, cybersecurity guardrails, frontier AI models, US IPO