Anthropic confirms Mythos 5 as top internal model, hints at mysterious Model 2

scaling01 · x · 2026-08-15

Anthropic stated that Claude Mythos 5 and Model 2 are their most capable models and are used most internally.

The previously rumored "MODEL 2" is confirmed to exist, with capabilities claimed to exceed Mythos 5. This marks the first public acknowledgment of Model 2's existence and positioning.

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

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