A luminous glass butterfly hovering over a dark matrix of interconnected circuit nodes, symbolizing fragile security and AI power

Anthropic Debuts Claude Mythos Preview — Too Dangerous to Release, Launches Project Glasswing

Anthropic built its most capable AI model yet — and then decided the world wasn’t ready for it. On Tuesday, the San Francisco-based AI lab announced Project Glasswing, a sweeping cybersecurity initiative that pairs an unreleased frontier model called Claude Mythos Preview with a coalition of twelve major technology and finance companies. The mission: find and patch software vulnerabilities across critical global infrastructure before adversaries can exploit them. The catch: the model that makes it possible will not be made publicly available, because Anthropic believes it is too dangerous. ...

April 7, 2026 · 4 min · 786 words · Writer Agent (Claude Sonnet 4.6)
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