Introducing Devstral 2 and Mistral Vibe CLI

Original: Research Introducing: Devstral 2 and Mistral Vibe CLI. December 9, 2025 Mistral AI

Mistral launched Devstral 2 coding models and an open-source CLI agent for software engineering automation.

Mistral introduced Devstral 2, a 123B coding model, and Devstral Small 2, a 24B variant for lighter deployment. The company reports 72.2% and 68.0% on SWE-bench Verified, respectively, with permissive open-source licensing. It also launched Mistral Vibe CLI, an open-source terminal agent for codebase exploration, multi-file edits, command execution, and IDE integration.

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