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Mistral open-weights Mistral Large 4 (Le Chonk), its 1T flagship

10/29/2026 — 10/29, 23:21·8 sources (all)·10 reports (all)·In the 2026-10-29 briefing

Key takeaways

  • Mistral AI has opened the weights of Mistral Large 4 (codename Le Chonk), a 1T-parameter natively multimodal MoE with 49B activated paramete…
  • the license and scope of release were not disclosed.

Background & analysis

On October 29, 2026, Mistral AI opened up the model weights of Mistral Large 4, a release the company also refers to by the codename Le Chonk. According to Mistral AI, Mistral Large 4 is a 1T parameter multimodal model and, in the company's words, the strongest open-weight model for coding, trained in Europe.

Later that evening, The Next Web reported that Mistral had published the weights of Mistral Large 4 on Hugging Face, noting that the model had been previewed only three weeks earlier and that the version now on Hugging Face is noticeably sharper. The Paris-based company said that three extra weeks of reinforcement learning, guided by customer feedback, had made ML4 the strongest open model for agentic coding and cyber defence.

Wired reported on the same day that French AI lab Mistral's Le Chonk matches or even outperforms the best models from DeepSeek and Z.ai in coding and cybersecurity tasks. Wired also made clear that this comparison comes from Mistral itself, and the report did not mention any third-party verification. As of now, the model weights are available, and no further developments have been reported.

AI-generated from 3 reports · updated 1 hour ago

Latest turnMistral has released the weights for Mistral Large 4, codenamed Le Chonk, and says it rivals leading open models such as GLM-5.3 on the Artificial Analysis Coding Agent Index. According to ZDNET, the company also claims substantial gains in reasoning efficiency that lower inference costs.

24-hour heatHeat index 765 · peak 773 · now
24 hours agonow

Reports on this story headlines open the original

Today
  1. Mistral has released the weights for Mistral Large 4, codenamed Le Chonk, and says it rivals leading open models such as GLM-5.3 on the Artificial Analysis Coding Agent Index. According to ZDNET, the company also claims substantial gains in reasoning efficiency that lower inference costs.

    TechmemeAI score 71
  2. TestingCatalog reports on X that Mistral Large 4, codenamed Le Chonk, is now available on Hugging Face. The post cites claims of substantial gains in reasoning efficiency and lower inference costs, and highlights the model's ranking among open-weight models.

    X:TestingCatalog (@testingcatalog)AI score 69
  3. Mistral has published Mistral Large 4 on Hugging Face, according to a post on the LocalLLaMA subreddit that links the official blog. The poster says the model is a 1T-parameter release and points to llama.cpp support.

    Reddit · LocalLLaMAAI score 61
  4. According to Mistral's description relayed on Reddit's LocalLLaMA, Mistral Large 4 (codename Le Chonk) is its largest and most capable model yet: a 1-trillion-parameter natively multimodal MoE with 49B active parameters per token (52B including embeddings and output layers), trained from scratch on 3,800 NVIDIA Grace chips. Community GGUF and NVFP4 quantizations are already up on Hugging Face.

    Reddit · LocalLLaMAAI score 74
  5. A post on Reddit's LocalLLaMA says Mistral's flagship Mistral Large 4, codenamed Le Chonk, is now open weight, following its release as a 1-trillion-parameter natively multimodal MoE. The post does not specify the license or exactly what weights were released.

    Reddit · LocalLLaMAAI score 70
  6. ZDNet reports that Mistral has released the weights for Large 4, with its coding model Le Chonk ranking among top open models alongside Codex GPT-6.1 Terra on Artificial Analysis. The release gives developers a new open-weight option for coding work.

    ZDNet · AIAI score 71
  7. Mistral has released a new open-weight model called Le Chonk, claiming it matches or outperforms the best models from DeepSeek and Z.ai on coding and cybersecurity tasks, Wired reports. The comparison comes from Mistral itself, and the report cites no independent verification.

    Wired · AIAI score 59
  8. French startup Mistral has released Large 4, a trillion-parameter model it says reaches frontier performance among open models for agentic coding and cyber defense. Mistral calls it the best open model built in the West and is pitching it to businesses worried about losing access to closed AI.

    FortuneAI score 69
  9. Mistral has released the weights of Mistral Large 4, its 1-trillion-parameter model, on Hugging Face about three weeks after first previewing it, The Next Web reports. The Paris-based company says three extra weeks of reinforcement learning guided by customer feedback make it the strongest open model for agentic coding and cyber defence.

    The Next WebAI score 72
  10. Mistral AI has released the weights of Mistral Large 4, codenamed Le Chonk, a 1T-parameter multimodal model it calls the best open-weight model for coding. The company says the model was trained in Europe.

    Mistral AIFirst-partyAI score 76

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