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Anthropic opens its most powerful AI models to more security teams

The three-tier program gives vetted organizations access to Claude models with fewer safeguards after scans found more than 100,000 software vulnerabilities.

  • On Tuesday, Anthropic expanded its Cyber Verification Program into three access tiers, opening Claude Opus 5.5, Claude Sonnet 5.5, and Claude Mythos 5.1 to a broader range of cybersecurity organizations.
  • The revamped CVP integrates Project Glasswing, which provided Claude Mythos access to critical software teams, and the original Cyber Verification Program, combining two initiatives Anthropic operated for six months.
  • Partners in the Project Glasswing initiative identified 129,000 verified software vulnerabilities between April and July 2026, with more than 33,000 rated as critical- or high-severity.
  • In the Red Team Access tier, the model completed 34 of 50 tasks with no blocks, while the Defense Access tier saw 46 of 50 trials blocked, demonstrating graduated safety controls.
  • Qualifying entities include security teams at universities, firms, and critical infrastructure operators, though the Specialized Access tier requires detailed vetting with U.S. government involvement to test safety-critical systems.
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Anthropic opens its most powerful AI models to more security teams

Anthropic is expanding a program that allows vetted cybersecurity professionals to test its most powerful AI models with fewer safeguards, after its Project Glasswing initiative helped uncover ​more than 100,000 software vulnerabilities this year.

·London, United Kingdom
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More than 33,000 vulnerabilities have so far been classified as critical or of high severity

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Anthropic partners with US government to test advanced AI cyber capabilities

Anthropic's collaboration with the US government could boost its market position and valuation, influencing AI industry dynamics significantly.

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Reuters broke the news in London, United Kingdom on Tuesday, October 6, 2026.
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