Export controls, turned inward

At 5:21pm on a Friday, Anthropic received an order from the Commerce Department's Bureau of Industry and Security: cut off access to two of its frontier models — Fable 5 and Mythos 5 — for any foreign national, anywhere, inside the US or out. That sweep included roughly a third of Anthropic's own staff, who are not US citizens, and named figures like Andrej Karpathy, a US resident barred from a model anyone could have paid for three days earlier.

"To date, the government has only given us verbal evidence of a potential narrow, non-universal jailbreak, which essentially consists of asking the model to read a specific codebase and fix any software flaws." — Anthropic

The instrument is the novel part. Export controls are the regime built to keep advanced chips and weapons away from foreign adversaries — discrete items, shipped to named countries. Here that authority was aimed inward, at a live service reachable by anyone with an API key and at a US company's own employees. Anthropic cannot check a caller's nationality at the API layer, so the only way to comply was to disable both models globally. The practical result of a 'controlled export' order was a model exported to no one.

The trigger, per the reporting, was a jailbreak of Fable 5's cyber guardrails — flagged not by a rival or a foreign actor but by Amazon, a commercial partner and major Anthropic investor. Anthropic disputes the severity, saying it received only verbal evidence of a 'narrow, non-universal' flaw and no written justification, and that the same prompt works on competitors' public models. With the directive letter itself unpublished, the government's stated national-security basis stays out of public view — which is its own precedent: an entire model class can now vanish overnight on an order no one outside the room can read.