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Anthropic's AI Found 129,000 Software Bugs — Now It's Arming More Security Teams

Anthropic just made a big bet on AI-powered defense. It's expanding access to its most powerful AI models — with fewer safeguards — to more vetted cybersecurity teams. The reason: its AI already found over 129,000 real software vulnerabilities this year.


What Project Glasswing uncovered


Partners under Anthropic's Glasswing initiative found at least 129,000 verified software vulnerabilities between April and July 2026, more than 33,000 of them rated critical or high severity. Anthropic's own open-source scanning added 5,500 more between April and October. The company says the true number is likely at least five times higher, since the data covers only a limited group of partners.


The revamped Cyber Verification Program


Anthropic announced Tuesday a revamped Cyber Verification Program (CVP) combining two programs it ran for six months. Glasswing gave critical-software organizations access to Claude Mythos, its most cyber-capable model family, while the original CVP gave vetted teams reduced safeguards on Claude Opus and Sonnet models. The new program has three tiers.


The Defense tier covers incident response and malware analysis for security teams, critical-infrastructure operators, open-source maintainers, and researchers with a track record of reported vulnerabilities. The Red Team tier adds authorized penetration testing and is open to organizations only. The Specialized tier, with the fewest restrictions, is reserved for a small group authorized to test safety-critical systems like power grids, flight systems, and interbank transfer infrastructure. All tiers include access to Claude Opus 5.5, Sonnet 5.5, Mythos 5.1, and future models.


Why it matters


When Anthropic unveiled Claude Mythos Preview in April, fears surfaced that AI could hack software before it could be secured. Anthropic is betting that giving the best tools to defenders first wins that race — and the trend is industry-wide: Mistral's new Large 4 is also being pre-released to cybersecurity experts and state authorities with fewer safety barriers before its October 27 public launch.


AiPost's take: The cybersecurity game has flipped. AI is now both the fastest bug hunter and the tool everyone is nervous about handing to the wrong people. Defense-first access looks like the sanest way to run the experiment.

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