devstral2

devstral2 is a state-of-the-art, open-source coding model built on a dense transformer architecture with 123B parameters and support for a 256K context window, giving you enough room to work with large, real-world codebases without losing track of the bigger picture.

On SWE-bench Verified, devstral2 achieves 72.2%, establishing it as one of the best open-weight models available today. It stays highly cost-efficient at the same time, so you get top-tier coding performance without paying a premium, and it is released under a modified MIT license, setting the open state-of-the-art for code agents.

Alongside the model, Mistral Vibe CLI is a native, open-source command-line coding assistant powered by devstral2. It is designed to solve software engineering tasks autonomously: exploring your codebase, modifying files, and executing changes across projects, all driven by simple natural language instructions.