Anthropic expands Cyber Verification Program to give vetted security teams access to Claude Opus 5.5, Sonnet 5.5 and Mythos 5.1
Anthropic launched an expanded Cyber Verification Program (CVP) with three access tiers — Defense Access, Red Team Access, and Specialized Access — to grant qualifying security professionals reduced blocking and access to its most capable models (Claude Opus 5.5, Claude Sonnet 5.5, Claude Mythos 5.1 and future models). The program includes tiered verification and controls, required data retention for monitoring (with an option for zero-retention via Enterprise Frontier Safeguards later this fall), and maintains safeguards against actions that could cause physical harm or mass disruption.