Anthropic Expands Cyber Verification Program to Three Access Tiers

Anthropic has announced an expanded Cyber Verification Program, making advanced cyber capabilities and reduced blocking classifiers available to qualified security professionals across three access tiers.

Each tier includes access to Claude Opus 5.5, Claude Sonnet 5.5, Claude Mythos 5.1, and new models forward. Anthropic described cybersecurity as inherently double-edged, stating that the same capabilities that enable a security team to find and fix a vulnerability can also help a malicious actor exploit it.

The company noted that its generally available models, including Claude Opus 5.5, Claude Fable 5.1, and Claude Sonnet 5.5, contain conservative cyber-safeguards that block the majority of cyber work, a approach that Anthropic claims will limit malicious activity from malicious actors while working to reduce false positives in secure coding.