Rumor: Mythos Preview may be a 10T parameter teacher model

scaling01 · x · 2026-08-15

Speculation suggests that Anthropic's Mythos Preview is actually a massive 10T parameter teacher model. Model 1 and Model 2 are thought to be further iterations of this same model, while Mythos 5 and Fable 5 are likely smaller distilled models. Recent data shows Model 2 outperforming others on CoBench V2.

Related event: Anthropic Confirms Mythos 5 as Its Strongest, Validating Mysterious Model 2(4 posts)→

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