5 November 2026
Moonshot releases Kimi K3.1 Pro as open weights
First reported
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- Moonshot AI, a Chinese AI company, has released the model weights for Kimi K3.1 Pro, meaning anyone can download and run the model.
- K3.1 Pro is an updated version of the Kimi K3 model, with 2.8 trillion total parameters and 104 billion active per query.
- On the Agent Arena leaderboard, a ranking of AI systems that complete multi-step tasks, it places first among open models and 13th overall.
Our read
Only 1 of 30 newsletters, Latent Space, covered the weights release, which Newskeryx first reported on 2026-11-05. It follows the October stories in our archive on Kimi K3.1 Pro, including the 2026-10-25 announcement that said weights were due November 4.
Earlier on this story
Written by Newskeryx from which newsletters covered this story and from our own archive.
How it was covered
Latent Spaceswyx & Alessio
Model specs, Agent Arena rankings, user reports, and day-0 hosting and inference support