FreeLLMMoonshot AI launches Kimi‑K3.1‑Pro, a 2.8‑trillion‑parameter multimodal model on Hugging Face
The new Kimi‑K3.1‑Pro model adds a 1‑million‑token context window and shows strong results on coding, 3D and finance benchmarks.
The model is open‑weight and multimodal, built on a 2.8 trillion‑parameter Mixture‑of‑Experts architecture with 104 billion activated parameters.
It supports a 1 million‑token context length and uses a Vision Encoder called MoonViT‑V2. Quantization is MXFP4 for weights and MXFP8 for activations.
Benchmarks show Kimi‑K3.1‑Pro leading in several tasks: 92.7 % on BenchCAD with tools, 77.1 on Kimi Code Bench 2.0, and 95.4 % on BabyVision. It also scores 66.4 on Terminal‑Bench coding, close to DeepSeek‑V4.1‑Flash‑1017’s 66.4.
FreeLLMArena’s latest blind vote ranks the earlier Kimi K3 model as the top free chat model, indicating strong community interest in Moonshot’s releases.
What it means for you
Kimi‑K3.1‑Pro offers a high‑capacity, open‑weight option for developers needing extensive context and multimodal capabilities, expanding the free‑model ecosystem.
Sources
- Moonshot AI releases Kimi-K3.1-Pro on Hugging Face, Hugging Face trending (official), 2 Nov 2026
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