
Moonshot AI releases the weights of Kimi K3.1 Pro, a 2.8T-parameter open model with a 1M-token context
The mixture-of-experts model activates 104B parameters per token and ships under a custom licence that requires large commercial users to display its name; Moonshot's own benchmarks put it just behind Claude Opus 5.5 on Terminal-Bench 4.0.





