Anthropic on October 6, 2026 announced an expanded Cyber Verification Program that makes advanced cyber capabilities and reduced blocking classifiers available to qualifying 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 going forward. Anthropic described cybersecurity as inherently dual use, saying the same capabilities that let a security team find and fix a vulnerability can also help a…