Kimi K3.1 Pro nearly ties Claude Opus 5.5 at coding, and the weights are coming
Moonshot AI released Kimi K3.1 Pro, a 2.8 trillion parameter model that lands in fourth place on the Artificial Analysis Intelligence Index and comes within a hair of Claude Opus 5.5 on a tough coding benchmark. It is cheaper than its predecessor, and Moonshot promises the full weights by 4 November. Here is what the numbers say, what they do not say, and why the cyber section of the release matters.