Claude Fable 5 and Mythos 5

Anthropic@felixriesebergJun 9, 2026

Today, we're introducing Claude Fable 5 and Mythos 5, two configurations of our next major language model. I'd normally highlight the numbers: It's SOTA on nearly all benchmarks. I want to talk about something else, because with Fable 5 out in the world, I think a third era

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Launched Jun 9, 2026View post

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