Bringing the cybersecurity capabilities of Claude Mythos 5 to more defenders
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Anthropic is expanding access to its Claude Mythos 5 model for cybersecurity defenders while implementing new safety guardrails to prevent misuse. The company is also launching a $35 million fund to support open-source software security and expanding its Cyber Verification Program.
Why it matters
As AI models become more powerful, balancing their utility in cybersecurity defense against the risk of offensive exploitation is a critical challenge for the tech industry.
Category Product announcements Product No items found. Date August 21, 2026 Reading time 5 min Share Copy link https://claude.com/blog/bringing-claude-mythos-5-to-more-defenders We're sharing an update on our efforts to help more teams use frontier capabilities for cyber defense. Claude Mythos 5 is now available in Claude Security , and coming soon to partners' cyber defense tools. We're also launching a $35M fund to help secure open-source software and sharing plans to expand our Cyber Verification Program .
In April, we launched Project Glasswing to put our most capable frontier model, Claude Mythos Preview (and its successor, Claude Mythos 5), in the hands of a small group of organizations securing the world’s most critical software. This gave defenders a window of time to find and fix vulnerabilities ahead of models with similar capabilities becoming generally available or reaching malicious actors.
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