AI2 min
Chinese AI firm Moonshot releases Kimi K3.1 Pro, ranked 4th by an independent benchmark
Moonshot has unveiled Kimi K3.1 Pro, which it calls its most capable 3T-class open-weight model, with a 1-million-token context window. A faster version, K3.1 Pro Highspeed, comes with it, and Moonshot says it will release the full weights by November 4. The benchmarking firm Artificial Analysis scores it 55 on its Intelligence Index, 11 points above Kimi K3. That puts it fourth, behind Opus 5.5, Sonnet 5.5 and Muse Wonder Full. Moonshot also says it removed cyber-related data from parts of training "to reduce potential misuse risk while preserving general usefulness".
Why it matters: Artificial Analysis says it will be the top open-weights model once the weights are out, so the gap between models anyone can download and the closed leaders is narrowing. The weights aren't out yet.