Next-gen open-source coding models
Devstral is a next-generation coding model family that includes two versions: Devstral 2 (123B parameters) and Devstral Small 2 (24B parameters). Both models are open-source and licensed under modified MIT and Apache 2.0 licenses, respectively, designed to enhance distributed intelligence. Devstral 2 achieves a score of 72.2% on SWE-bench Verified, establishing it as a leading open-weight model while being highly cost-efficient, up to 7 times more efficient than Claude Sonnet in real-world tasks. The model supports a 256K context window and is built for production-grade workflows, enabling exploration of codebases and orchestration of changes across multiple files while maintaining architectural context. Devstral Small 2, capable of running on consumer hardware, scores 68.0% on SWE-bench Verified and is suitable for local deployment and custom fine-tuning. Additionally, the Mistral Vibe CLI provides a native, open-source command-line interface for automating software engineering tasks autonomously.