Mistral releases Mistral Large 4, a trillion-parameter open-source model
What happened
In October 2026, Mistral released Mistral Large 4, a trillion-parameter model. According to The Decoder, the company published the weights on Hugging Face three weeks after a public preview. Nicknamed Le Chonk, the model has roughly one trillion total parameters and activates 52 billion per step, accepts text and image input and outputs text and code. The report says its coding ability leads open-source models but that it still trails Chinese models overall. The primary release information on the Hugging Face Blog describes the model as a multimodal MoE model with about 1T total parameters, 49B activated parameters and a 1M-token context window, released in two official weight formats, FP8 and NVFP4, under the Mistral Ecosystem Open-Weight License. Earlier reporting said 52 billion activated per step, while the later primary release information says 49B activated parameters. The model weights are now public, and developments centre on the open-source release and its performance positioning.
Written by AI from the reports · updated 3 h ago
Timeline
Follow the reports to see the event from each side.
- The DecoderParis-based Mistral releases "Le Chonk," a strong coding model that still trails China overall
Mistral has released the weights for Large 4, aka "Le Chonk," a trillion-parameter model trained entirely in Europe. Mistral says it beats its open rivals at coding, and independent testing shows it's fast and fairly cheap. It still can't match China's top models, scoring 26 points to the 32 posted by DeepSeek V4.1 Flash and GLM-5.3.
- Hugging Face BlogSelectedWelcome Le Chonk: Mistral Large 4 on Hugging Face
Mistral Large 4 (aka Le Chonk) is a multimodal, multilingual, Mixture-of-Experts (MoE) model from Mistral. It takes text and images as input and generates text. It has about 1T total, 49B active parameter, and a context window of 1M tokens.
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