Mistral says Mistral Large 4 (“Le Chonk”) is a 1-trillion-parameter model with 49 billion active parameters, trained natively for multimodal use. It describes the preview as the strongest open-weight model from the US or Europe on aggregated benchmarks, state of the art on cyber defense, manufacturing and finance workloads, and ahead of closed frontier models on visual grounding. Mistral also says it was built end-to-end in Europe and can run on its European Mistral Cloud infrastructure. Mistral AI’s announcement

Mistral says Mistral Large 4 (“Le Chonk”) is a 1-trillion-parameter model with 49 billion active parameters, trained natively for multimodal use. It describes the preview as the strongest open-weight model from the US or Europe on aggregated benchmarks, state of the art on cyber defense, manufacturing and finance workloads, and ahead of closed frontier models on visual grounding. Mistral also says it was built end-to-end in Europe and can run on its European Mistral Cloud infrastructure. Mistral AI’s announcement

The preview is available through the API today. Mistral says it is working privately with cybersecurity partners and plans to release the final model and its open weights by the end of October 2026; Guillaume Lample says the reinforcement-learning run is still in progress. Mistral AI · Guillaume Lample