Anthropic Expands Project Glasswing to ~200 Partners, Grants Mythos Preview Access for Critical Infrastructure

Anthropic

Industry official + media 3 src. ~1 min

Anthropic announced June 2 that Project Glasswing — its restricted cybersecurity AI partnership — is growing from ~50 organizations to ~200, adding 150 new participants across 15+ countries. The expanded cohort gains access to Claude Mythos Preview, Anthropic's advanced model for scanning codebases for vulnerabilities; early partners have already surfaced 10,000+ high- or critical-severity security flaws since April. New sectors being prioritized include energy, water, healthcare, and communications infrastructure.

Why it matters

Signals Anthropic is productizing its most powerful models for offensive-cybersecurity defense before general availability, while competitors like OpenAI (Rosalind biodefense) create parallel restricted-access safety programs.

Importance: 4/5

Anthropic flagship cybersecurity program expansion with official announcement and multiple media confirmations; first public disclosure of Mythos vulnerability-finding results.

Sources