Anthropic opens Claude cyber access to open-source maintainers and solo researchers in three new tiers

The expanded Cyber Verification Program, announced Oct 6, folds Project Glasswing in and offers Defense, Red Team, and Specialized tiers with fewer cyber blocks on Opus 5.5, Sonnet 5.5, and Mythos 5.1, and the Defense tier takes open-source maintainers and individual researchers with a record of reported vulnerabilities, with replies in a few days. Enrolled orgs must accept data retention, while regular Claude models still handle code review, patching known issues, and finding bugs in code you own.