Moonshot AI unveils Kimi K3.1 Pro, plans open weights by Nov. 4

Kimi K3.1 Pro debuted on Oct. 23, with Moonshot AI saying it and a faster Highspeed version are live across its services. The company plans to release open weights by Nov. 4. Moonshot also claims the model matches leading proprietary models on several benchmarks, but those comparisons are company claims. An earlier skeptical forecast explicitly came from someone who had not tested K3.1.