Claude on X: “Introducing Claude Fable 5: a Mythos-class model that we’ve made safe …”

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Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.

Its capabilities exceed those of any model we’ve ever made generally available.

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Jun 9, 2026, 5:08 PM UTC

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Claude on X: “Introducing Claude Fable 5: a Mythos-class model that we’ve made safe …” | PeekX