Kimi K3.1 Pro technical blog: Advancing open intelligence

Moonshot AI releases the 3T-class open-weight model Kimi K3.1 Pro, supporting a 1 million token context window. It scores 65.7% on Terminal-Bench 4.0, surpassing GPT-6 Astra (58.2%) and slightly below Claude Opus 5.5 (66.4%). A Highspeed version that is 2-3 times faster is released at the same time, with full weights to be released before November 4.