
Anthropic Expands Claude Mythos 5 Cyber Defense Access and Launches $35 Million Open-Source Security Fund
Anthropic announced on August 21, 2026, that it is expanding access to its frontier model Claude Mythos 5 for cybersecurity defense. The rollout integrates Mythos 5 into Claude Security for Enterprise customers, prepares integrations for third-party security tools, launches a $35 Million Open-Source Security Fund.



















