Mistral Small 3.1Open Weight

Mistral Small 3.1 was released by Mistral on Monday, Mar 17 2025.

Mistral Small 3.1 was built by Mistral. French AI company building open and commercial models. Founded in 2023 by former Meta and DeepMind researchers.

Partly. Mistral Small 3.1 is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.

Mistral's previous tracked release was Mistral Small 3 on Jan 30 2025, 46 days earlier. It was followed by Mistral Medium 3 on May 7 2025.