Anthropic restores AI models Fable, Mythos after the U.S. lifts export controls
The government cleared Fable 5 and Mythos 5 on June 30, weeks after a cybersecurity finding triggered an export order that froze access for everyone.
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Summary
- Anthropic is restoring access to its Claude Fable 5 and Claude Mythos 5 AI models after U.S. export controls that forced a June suspension were lifted at the end of the month.
- Fable 5 is returning globally on July 1, while Mythos 5, a less restricted variant of the same underlying model, is being reintroduced only to approved U.S. organizations following government review.
- The episode, triggered by an Amazon-discovered jailbreak that let Fable 5 generate exploit code, has spurred closer collaboration between Anthropic and U.S. agencies on model testing, threat sharing and standards for rating jailbreak risks.
