Kimi K3.1 Pro tops open-weight model leaderboard, Moore Threads completes Day-0 adaptation

Moonshot AI has released the full model weights of Kimi K3.1 Pro. It is the first model of the K3.1 series, with 3 trillion parameters and support for 1 million context. It ranks first among open-weight models and 13th overall on the Agent Arena leaderboard.

Moore Threads announced it has completed Day-0 adaptation of the model using its MTT S5000 AI compute card and MUSA software stack, enabling model loading, service startup, and basic text and image inference.

After large-scale post-training and reinforcement learning, the model improved in coding, 3D creation, and finance research. It scored 65.7% on Terminal-Bench 4.0 and 61.2% on Kimi Code Bench 3.0, close to top closed-source models.

The MUSA software stack supports fast migration, including sparse attention DSA and online MXFP4 weight conversion, helping deploy super-large models quickly.