Anthropic cuts off Fable 5 and Mythos 5 access following government order
TL;DR
The US government ordered Anthropic on Friday evening to block Fable 5 and Mythos 5 for all foreign nationals, including those inside the US. Because the order also covered Anthropic employees, the company cut off access to both models for every customer instead of segmenting users. The stated reason is national security, but Anthropic says the government did not provide specific written details about the concern.
Nauti's Take
This is not a normal safety patch; it is a hard political intervention in core AI infrastructure. Anthropic's pushback is plausible, but also clearly self-interested: without transparent evidence, it is hard to tell whether this was a real security emergency or a regulatory precedent.
For teams, model dependency is now also geopolitical operating risk.
Briefingshow
The case shows how quickly AI access can move from a product issue to a security and export-control issue. For customers, the risk is practical: even paid, production-critical models can disappear overnight when governments and providers disagree on evidence, risk and scope.
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