The US government abruptly shut down Anthropic's Fable 5 and Mythos 5 models citing national security, blocking access for all foreign nationals worldwide and creating unprecedented regulatory uncertainty for AI companies.
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Commerce Secretary Lutnick imposed export controls after Amazon researchers discovered jailbreaks, though Anthropic argues the vulnerabilities were minor and already publicly known through other methods.
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The ban prevents even Anthropic's own foreign national employees from accessing the models, raising questions about how companies can verify citizenship for API access and downstream services.
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Industry observers argue this creates precedent for capability-based restrictions, potentially requiring government clearance for future model releases and accelerating sovereign AI development outside America.
This is a new kind of Iron Curtain. Digital, intellectual — Malan