Anthropic pulls Mythos and Fable 5 AI models as White House bans all foreign access

By Matthew Griffin Computing 26th May 2026

WHY THIS MATTERS IN BRIEF

Export controls are moving from chips to AI models themselves, redrawing who may use frontier intelligence.

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Anthropic said it is complying with a Trump administration directive to suspend foreign nationals from access to its Fable 5 and Mythos 5 Artificial Intelligence (AI) models, and is subsequently disabling the tools for all users including those in the US.

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“The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees,” the company said in a .

The directive, which Anthropic said it received at 5:21 pm Friday, marks the most significant action yet by the Trump administration to place export restrictions on cutting-edge models. That’s despite earlier statements, including in an executive order, that the US would not be imposing a licensing regime for model reviews. A US official confirmed the Commerce Department sent the letter.

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Friday’s directive adds to pressure that Anthropic specifically is facing from the US government. Earlier this year, the Pentagon labelled the company a supply chain risk after a protracted contracting dispute over guardrails the company insisted on spelling out.

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The restriction could also risk stymieing the growth of Anthropic, one of the country’s most valuable startups and which is expected to head for an initial public offering in coming months.

The directive did not provide specific details of the government’s national security concern, Anthropic said.

“Our understanding is that the government believes it has become aware of a method of bypassing, or jailbreaking Fable 5,” it said.

“However, we disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people.”

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Privately-held Anthropic, which has long positioned itself as a more responsible AI developer, first released its Mythos model in April to a limited group of business and government partners, while warning of its abilities to find cybersecurity bugs. This week, it released a public-facing version – Fable 5 – with significant guardrails designed to prevent customers from deploying it for potentially dangerous cyber or biology uses.

The Mythos release accelerated the Trump administration’s efforts on AI policy, including a recent executive order that called for voluntary model review. That order explicitly said that nothing in it should be construed as creating a mandatory licensing regime.

What did the Trump administration's directive require Anthropic to do?
Suspend all foreign-national access to Fable 5 and Mythos 5; Anthropic responded by disabling the models for all users, citing the reach over employee nationality.

Matthew Griffin / About Author

Matthew Griffin is a multi-award winning Futurist and expert in Disruption and Innovation, Geopolitics, Leadership, and Technology, who NASA have described as a "walking encyclopaedia of the future" and a "futurist Polymath." 15-time best selling author of the "Codex of the Future" series, Matthew is the Founder and Futurist in Chief of the 311 Institute, a global Futures and Deep Futures advisory firm working with royal households, world leaders, G7, G20, and G77 governments, NGOs, and multi-national mid and mega cap firms to help them explore, shape, and lead the next 50 years of business and society.

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