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Claude Fable 5 and Mythos 5 redeployedAccess to Claude Fable 5 and Mythos 5 is now restored.
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Access to Claude Fable 5 and Mythos 5 is now restored.
The US government issued an export control directive citing national security, requiring Anthropic to disable Fable 5 and Mythos 5 for all users. Other models are not affected. Below is the official statement.

This was not a traditional server breach. It was a public stress test around the safety guardrails of a frontier model.