# Moonshot AI announces Kimi K3.1 Pro, a 2.8T-parameter open-weight MoE model

> Original title: BREAKING 🔥: Kimi AI officially announced Kimi K3.1 Pro, a 2.8T total and 104B active params MoE open model.

- Source: Testing Catalog
- Published: 2026-10-23T17:44:47.000Z
- Bad Influence: https://badinfluence.news/items/p13t0ux2uxkgjpal44gggw9on
- Original: https://x.com/testingcatalog/status/2113688095660896452

## Summary

Moonshot AI says Kimi K3.1 Pro is a 2.8T total, 104B active parameter mixture-of-experts model with a 1M-token context and multimodal input. The company claims it matches leading proprietary models on coding, agentic, and knowledge benchmarks, and open weights are due November 4, 2026. A Terminal-Bench 4.0 chart in the post places Kimi K3.1 Pro near the top score at a lower cost per task than the models shown.

## Post

BREAKING 🔥: Kimi AI officially announced Kimi K3.1 Pro, a 2.8T total and 104B active params MoE open model. 

On benchmarks, Kimi K3.1 Pro performs on par with leading AI models like Opus 5.5 and GPT-6 Astra, while being significantly cheaper. 

Open weights are coming on November 4th as well!

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHVVUHlvWsAA6uBc.jpg&mode=thumb&exp=1793404800&sig=16510f221cf57501)

## Quoted post @Kimi_Moonshot

> Introducing Kimi K3.1 Pro: our most capable 3T-class open-weight model.
> 
> 🔹 1M-token context, 2.8T total / 104B active params (MoE), Multimodal.
> 🔹 Full-project coding: games in Unreal, Unity & Godot.
> 🔹 Excels at parametric 3D modeling in Blender & CAD.
> 🔹 More reliable at finance work: Accurate modeling with hallucination down by 65%.
> 🔹 Matching the strongest proprietary models across coding, agentic and knowledge benchmarks.
> 
> Kimi K3.1 Pro and K3.1 Pro Highspeed (2–3× faster) are now live on http://Kimi.ai, Kimi Work, Kimi Code, and the Kimi API.  
> 
> Open weights by Nov 4, 2026.
> 
> 🔗 API: http://platform.kimi.ai 
> 🔗 Tech blog: http://kimi.ai/blog/kimi-k3-1-pro

https://x.com/Kimi_Moonshot/status/2113680701770068067