Project Glasswing — Simon Carter

Claude Mythos 5 launches in secret: same model as Fable 5, cybersecurity safeguards removed

Anthropic's restricted Claude Mythos 5 shares its architecture with Fable 5 but ships without cybersecurity guardrails, deployed via Project Glasswing with the US government.

9 June 2026

Security & Governance

Anthropic Expands Project Glasswing to 150 New Organisations Across Critical Infrastructure — and Launches Claude Security for Everyone

Anthropic brings Claude Mythos Preview to ~150 new orgs in 15+ countries covering power, water, healthcare and more, plus launches Claude Security in public beta.

2 June 2026

Security & Governance

Claude Mythos Preview found 10,000+ critical vulnerabilities in one month. Here's what that actually means.

Anthropic's Project Glasswing used Claude Mythos Preview to find over 10,000 high or critical vulnerabilities across critical software in just one month.

22 May 2026