Someone Built an Open-Source ‘Theoretical Mythos’ to Reverse-Engineer Anthropic’s Most Dangerous AI

In brief OpenMythos is a from-scratch reconstruction of the Claude Mythos architecture, built only from public research papers and educated guesses. Claude Mythos is Anthropic’s most powerful model, locked away in Project Glasswing because it autonomously found 271 Firefox vulnerabilities and 32-step network attacks. The repo is theoretical scaffolding—code without trained weights. It mirrors a…

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