Anthropic pulls Fable 5 and Mythos 5 offline after US government export order

Anthropic has shut down access to its two newest AI models, Fable 5 and Mythos 5, after the US government issued an export control directive on June 12, 2026. The company received the order at 5:21pm ET and disabled both models for all users worldwide within hours. The shutdown marks the first time Washington has forced a commercial AI product entirely offline.

The order

Fable 5 and Mythos 5 launched on June 9 as Anthropic's most powerful Mythos-class models. Three days later, national security officials told the company that someone had jailbroken Fable 5—meaning they had found a way to bypass its safety guardrails. The government's directive required Anthropic to suspend access for any foreign national, including foreign-national Anthropic employees inside the US.

Anthropic chose a broader response: it cut off all users globally rather than enforce a citizenship-based restriction it considered unworkable and unfair. Claude's other models remain available.

The dispute

Anthropic's official statement pushed back hard on the jailbreak claim. The company says the technique involved reading through a codebase to find flaws—a narrow, non-universal method, not a general bypass. Anthropic also says the same technique works on OpenAI's GPT-5.5 without triggering any government restriction, raising questions about selective enforcement.

The company received no written threat assessment from the government, only a verbal briefing. It is now investigating the incident and says it expects to restore access once the situation is resolved.

What it means

The precedent is the real story here. The Next Web reports that this fits a pattern of the Trump administration applying pressure to Anthropic specifically. The company warned that if this standard—pulling a model offline over a narrow, disputed jailbreak—were applied consistently across the industry, it would effectively halt every frontier AI deployment from every major provider.

That warning lands at a sensitive moment. Anthropic reportedly filed confidentially for a stock market listing this month, and a government willing to kill its flagship models on short notice is not a comfortable backdrop for any IPO.

For everyday users, the practical impact right now is simple: Fable 5 is unavailable, Mythos 5 was only ever accessible to vetted enterprise customers, and all other Claude models continue to work normally. The company says it is working to resolve the situation as quickly as possible.