Anthropic Disables Fable 5 and Mythos 5 After US Export Control Order

Anthropic said it received a US government export control directive on June 12, 2026 at 5:21pm ET ordering it to suspend all access to its two most capable models, Fable 5 and Mythos 5, for any foreign national. To comply, the company is disabling both models for every customer, not only overseas users. Access to all of Anthropic's other models is unaffected.

The order, which Anthropic says cites national security authorities, applies to "any foreign national, whether inside or outside the United States, including foreign national Anthropic employees." Because the company cannot reliably separate foreign nationals from the rest of its user base in real time, the practical result is a hard shutoff of Fable 5 and Mythos 5 worldwide.

What the directive covers

• Who is blocked: every foreign national, inside or outside the US, including Anthropic's own foreign-national staff.
• Net effect: Fable 5 and Mythos 5 go dark for all customers while Anthropic ensures compliance.
• What stays up: all other Anthropic models keep running normally.

Why the government acted

According to reporting from Axios and CNBC, the Commerce Department moved after another company claimed it had found a way to "jailbreak" Mythos, raising concern inside the administration about national security risk. Commerce Secretary Howard Lutnick sent a letter to Anthropic chief executive Dario Amodei informing the company that Fable 5 and Mythos 5 would be subject to export controls. The letter did not spell out the specific national security concern.

Anthropic disputes the basis

In its public statement, Anthropic said it is complying with the legal directive while disagreeing with the rationale. The company said the government has so far provided only verbal evidence of a "narrow, non-universal jailbreak" that involves asking the model to read a specific codebase and fix software flaws. Anthropic argues that the capability in question is widely available from other models, including OpenAI's GPT-5.5, and that a narrow potential jailbreak should not justify recalling a commercial product already deployed to hundreds of millions of people. It called the situation a likely misunderstanding and said it is working to restore access.

Why it matters

This is one of the first times Washington has aimed export controls at a deployed commercial AI model rather than at chips or hardware. For years the export-control fight centered on advanced semiconductors. Extending that regime to a live software model sets a precedent that could reshape how frontier labs ship products, who they are allowed to serve, and where their engineers can be based.

The immediate fallout lands on the businesses and developers who built on Fable 5, Anthropic's most powerful publicly available model, released only days earlier. Teams outside the US lose access overnight, and US teams lose it too while the company sorts out compliance. The inclusion of foreign-national employees also raises hard questions for every US AI lab that staffs its research and engineering teams globally.

What happens next

Anthropic says it is seeking to restore access and believes the order rests on a misreading of the jailbreak finding. Watch for formal documentation from the Commerce Department, any narrowing or clarification of the directive, and how rival labs respond now that a frontier model can be pulled from the market by government directive rather than by the company's own choice.

Frequently asked questions

What did the US government order Anthropic to do?

It issued an export control directive suspending all access to Fable 5 and Mythos 5 for any foreign national, inside or outside the US, including Anthropic's foreign-national employees.

Are all Claude models affected?

No. Only Fable 5 and Mythos 5 are being disabled. Anthropic says access to all of its other models is unaffected.

Why are US customers losing access too?

Because Anthropic cannot selectively block only foreign nationals in real time, it is disabling both models for every customer to ensure compliance.

What triggered the directive?

Reporting indicates the Commerce Department acted after another company claimed it had jailbroken Mythos. Anthropic says it has seen only verbal evidence of a narrow, non-universal jailbreak.

Is Anthropic fighting the order?

Anthropic is complying while disputing the rationale, calling it a likely misunderstanding and saying it is working to restore access.