Anthropic preparing new model 'Mythos 1'

·2026.05.26 01:57

Key point

Anthropic's new model 'Mythos 1' appears set to be introduced into Claude Code and Claude Security.

Details

Signs have been spotted indicating preparations for the release of Anthropic's new model, Mythos 1 (claude-mythos-1-preview).

The model was briefly exposed in the Claude interface recently, and new strings mentioning 'Mythos' have been confirmed to have been added within code related to Claude Code and Claude Security.

However, based on Anthropic's previous announcements, it remains unclear whether this particular model will be directly released to the general public.

llm anthropic claude-code claude-security claude-mythos-1

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