Mistral Unveils 1.05T-Parameter ‘Le Chonk’ MoE Model in Public Preview

Mistral AI announced Mistral Large 4 on October 6, 2026, introducing a general-purpose multimodal model that the company’s documentation lists at 1.05 trillion total parameters with 49 billion active parameters. The model, nicknamed “Le Chonk,” is available in public preview through Mistral’s API, with an open-weights release planned for the end of October 2026, the company said. The Mistral Large 4 documentation page, dated October 6, 2026, lists the model in Public Preview under the Open license category as version 26.10.

It describes a granular Mixture-of-Experts architecture with 1.05 trillion total parameters, 49 billion active parameters, and a 1.6-billion-parameter vision encoder, alongside a one-million-token context window. The model is served through the API identifier mistral-large-4. The documentation page also links to a playground where the model can be tried. The announcement described Mistral Large 4 as a one-trillion-parameter system that is natively multimodal, while the documentation page gives the model’s total as 1.05 trillion parameters.

On Mistral’s models page, the company presents the release as an open-weight hybrid model that handles both instruction following and reasoning on a Mixture-of-Experts architecture,…