When a Government Pulls an AI Model: What the Fable 5 and Mythos 5 Suspension Means for Security Teams

Summary

On June 12, 2026, a US export-control directive led Anthropic to disable Claude Fable 5 and Mythos 5 worldwide over a reported jailbreak. The reported trigger was a code-analysis capability that defenders use routinely. Here is what happened, how the security community read it, and what security teams can take from it.

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