Bringing the cybersecurity capabilities of Claude Mythos 5 to more defenders

Anthropic announced on 21 August 2026 that Claude Mythos 5 is available through Claude Security for Enterprise customers and is coming to cybersecurity partners' tools. Enterprise users can run the model in Claude Security to scan codebases for vulnerabilities and suggest patches. The post announces the Defender Advantage Fund with $35 million in credits for open-source security work covering vulnerability patching, automated scanning and patching, and experimental approaches, with initial recipients to be named later. The Cyber Verification Program expands to broader dual-use capabilities on Opus and Sonnet, with Mythos-class access to follow for verified organizations, and access is routed through purpose-built interfaces that return patches or alerts rather than direct model access.