Mistral opens Large 4, a 1.05-trillion-parameter model whose weights land at the end of October

On October 6, 2026, Mistral AI shipped a public preview of Mistral Large 4, nicknamed “Le Chonk”: a multimodal mixture-of-experts model of roughly 1.05 trillion parameters, 49 billion active per token, with open weights promised for October 27. Test it on your own workloads now, but withhold any judgment on the benchmarks until the weights and the license are actually published.