Anthropic expands Cyber Verification Program to three access tiers for security teams
Anthropic is expanding its Cyber Verification Program (CVP) and folding the separate Project Glasswing into it as a single offering with three tiers — Defense Access, Red Team Access and Specialized Access — giving vetted security teams reduced safety blocks on Claude Opus 5.5, Claude Sonnet 5.5 and Claude Mythos 5.1. On Anthropic's CyScenarioBench, Claude Opus 5.5 was blocked on all 50 trials without CVP access, 46 of 50 under Defense Access, and none under Red Team Access, where it completed 34 of 50 — equivalent to the 67.6% success rate with no safeguards. Anthropic also says Glasswing partners found at least 129,000 verified software vulnerabilities between April and July 2026, more than 33,000 of them critical or high severity, plus 5,500 from its own open-source scanning; it calls these numbers a significant undercount.
It shows a leading lab turning safety guardrails into tiered, application-based access for defenders, while putting numbers on AI-driven vulnerability discovery.