Moonshot AI releases Kimi K3 open-weight model

Kimi K3 is a 2.6T-parameter open-weight model from Moonshot AI, released under a 'Commercial Use Restricted' license. It leads open weights on Artificial Analysis's Intelligence Index at 57, leaving a 4-point gap to proprietary leaders — the smallest since GLM-5. It also tops open-weight entries in the Agent Arena with a +9.75% net improvement.