Semianalysis reports Mythos 2 is done training and Anthropic are not releasing the model. Anthropic’s August 2026 Risk Report describes an unreleased internal model it calls Model 2. It is more capable than Mythos 5, with no current plan to release it externally and the normal external-release evaluation suite not completed. They describe Model 2 ...

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Link :
https://www.nextbigfuture.com/2026/08/unreleased-anthropic-mythos-2-and-mythos-3-and-openai-astra.html