Devstral 2 (123B) is an AI model released by Mistral on Dec 9 2025, 7 days after Mistral Large 3. It is the 25th tracked release from Mistral out of 26 total. It is an open-source / open-weight model.
About Mistral: French AI company building open and commercial models. Founded in 2023 by former Meta and DeepMind researchers.