Anthropic's next Mythos model reportedly shows only modest improvement

haider1 · x · 2026-08-18

Rumors suggest Anthropic has finished training its next model, potentially named Mythos 2 or 5.1. However, internal reports indicate that Model 1 performs at roughly the same level as Mythos 5 or worse, while Model 2 shows only a modest jump in overall capabilities.

Related event: Report: Anthropic Trains Mythos 2 but Shelved It, Now Building Mythos 3(4 posts)→

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