Anthropic Launches Claude Mythos 5.1: The World's Most Advanced Cybersecurity AI Arrives with Unprecedented Safeguards
On September 4, 2026, Anthropic, OpenAI, and Google DeepMind made the most significant coordinated announcement in AI history: three cybersecurity-specialized frontier models launched simultaneously, including Claude Mythos 5.1 with access restricted to certified defenders only. A new era of enterprise security AI begins today.