February 5, 2026 Nicholas Carlini*, Keane Lucas*, Evyatar Ben Asher*, Newton Cheng, Hasnain Lakhani, David Forsythe, and Kyla Guru *indicates equal contribution Claude Opus 4.6, released today, continues a trajectory of meaningful improvements in AI models’ cybersecurity capabilities. Last fall, we wrote that we believed we were at an inflection point for AI's impact on cybersecurity—that progress could become quite fast, and now was the moment to accelerate defensive use of AI. The evidence sin...