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Claude Mythos 5.5 reference surfaced on Anthropic's Mythos page in an apparent staging leak

Claude Mythos 5.5 briefly appeared on Anthropic's Mythos page before being removed Reported - not confirmed by Anthropic. A hidden link labeled Claude Mythos 5.5 appeared on the official Mythos model page. TestingCatalog documented the mention on November 1, and archive checks cited by the outlet s…

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  1. 2026-11-01 23:05 · DEV Community — AI
    Claude Mythos 5.5 reference surfaced on Anthropic's Mythos page in an apparent staging leak

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