Mistral releases the weights of Large 4

Mistral released downloadable weights of Large 4 after its October API preview. The checkpoint uses a modified MIT license that requires separate commercial permission for Model-as-a-Service businesses.

From preview to downloadable weights

Mistral released an improved Large 4 checkpoint on October 29, following its October 6 public API preview. Reuters reported that the model could be downloaded and run independently; Mistral attributed the changes since preview to continued reinforcement learning and feedback. [1][2]

The Mistral Ecosystem Open-Weight License permits use and modification but requires a separate commercial license when the licensee or its affiliates operate a Model-as-a-Service business. The text defines that activity and exempts internal use and use through Mistral’s official products; downloadable weights do not imply an unmodified MIT license. [3]

Sources

  1. Mistral Large 4 (Le Chonk): Built for Coders, Trusted by Defenders.

    Mistral AI · Oct 29, 2026

  2. Mistral AI publicly releases Large 4, targets cybersecurity users

    Reuters · Oct 29, 2026

  3. LICENSE

    Mistral AI · retrieved Nov 3, 2026