The United States has imposed export restrictions on Anthropic's latest AI models, cutting off foreign access to Fable 5 — and the global fallout is escalating.

The ban came after Anthropic refused to patch a jailbreak vulnerability in Claude Fable, according to David Sacks. The White House's decision was also driven in part by fears that a related model, Mythos 5, had been accessed by a group linked to China, according to Semafor, as reported by The Verge. If confirmed, that access would represent a serious national security concern.

Senior Anthropic technical staff have traveled to Washington to meet with White House officials in an attempt to resolve the dispute, according to Axios. Both sides say they are eager to fix the situation.

The shutdown is already hitting Anthropic commercially. According to Forbes, customers are seeking refunds following the Fable 5 cutoff.

The restrictions have drawn sharp international responses. Canadian Prime Minister Mark Carney said the ban highlights the dangers of "over-reliance on certain models," comparing the systemic risks to those that contributed to the 2008 financial crisis, according to Bloomberg. The Washington Post, WSLS, and WRAL also covered Carney's remarks, framing them as a warning about depending too heavily on US AI infrastructure.

According to Reuters, the European Commission said it is assessing the practical implications of the US export control directive and warned that such measures "should not be discriminatory against partners" — raising questions about whether the restrictions could conflict with international trade norms.

Critics at the R Street Institute called the policy approach "A Bad Idea Applied Badly."

When the US restricts access to a leading AI system over a security dispute, it doesn't just affect one company — it forces governments and businesses worldwide to confront how deeply dependent they've become on American AI.