Moonshot's Kimi K3.1 Pro Reaches Fourth Globally While Trading Hacking Skills for Open Release

Moonshot AI unveiled Kimi K3.1 Pro on October 23, 2026, claiming the fourth-strongest model on the Artificial Analysis Intelligence Index with a score of 55, trailing only Claude Opus 5.5 (58), Claude Sonnet 5.5 (56), and Muse Wonder Full (56). The 2.8 trillion-parameter model strips cyber training data from its open-weights version—reducing exploit-solving capability from 90.5% to 81% on Moonshot's benchmark—to curb misuse risk while maintaining general-purpose utility.