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Anthropic Just Released a Powerful Mythos-Class Model to the Public—With Some Key Safeguards

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09.06.2026

Anthropic Just Released a Powerful Mythos-Class Model to the Public—With Some Key Safeguards

Meet Claude Fable 5: Anthropic’s version of Claude Mythos for everyday users.

BY BEN SHERRY, STAFF REPORTER @BENLUCASSHERRY

Anthropic has finally released a version of Claude Mythos, its most powerful model yet, but most people will experience it under a different name. 

The company just announced Claude Fable 5, its first commercially available Mythos-class model. The Dario Amodei-led company says that the new model’s capabilities “exceed those of every model we’ve previously made generally available.” The model is the first in Anthropic’s new line of Claude 5 models.

Anthropic has been preparing for this moment since April, when it first unveiled Claude Mythos, a line of extremely large, capable AI models. The company didn’t make Claude........

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