Mistral launches a preview of Large 4, a 1 trillion parameter model, and promises the weights by the end of the month

The preview is available through the API in Mistral Studio from 6 October. Mistral says the model was trained on 3,800 GPUs in its own data centers in Europe and that it will release the weights by the end of the month.

You can try Mistral Large 4 from 6 October, but you cannot download it. The preview runs through the API in Mistral Studio, and the weights, the company says, arrive by the end of the month.

The hardware is the most concrete part. Three thousand eight hundred GPUs in Mistral's own data centers in Europe, and a European deployment the company says it will run end to end, under European law. For a customer who has to say where the computation goes, that is the answer Mistral is offering.

Open is something else. The weights are not out yet, so for now you have an API, as with any closed provider. Under what license they will come, Mistral does not say yet: in the documentation the license field reads "Coming soon".

One sentence gets lost among the benchmarks: until the weights are released, security specialists, vetted partners and state authorities use ML4 with less moderation. Who exactly, the page does not say. As for why the cyber capability comes with open weights, Mistral points to refusals: a provider's refusal can stop legitimate vulnerability research or incident response, and losing access mid-incident is itself a risk.

The tables are Mistral's. Try the API with a task from your own work, in security or in law. When the weights are out, the first thing we will open is the license.