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Anthropic releases Claude Fable 5.1 and Mythos 5.1 after export setback

The new model lineup follows a prior export control that led Anthropic to pull Fable offline for 18 days.

Reported · Written up by our desk · Market Structure

Decrypt reports that Anthropic has shipped Claude Fable 5.1 and a restricted sibling, Mythos 5.1, about three months after export controls forced the company to take Fable offline.

The earlier action removed access for 18 days, according to Decrypt, as Anthropic adjusted to regulatory requirements.

Decrypt adds that Fable 5.1 is positioned as more than doubling its predecessor on a key benchmark, marking a major performance update alongside the model availability changes.

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