Mistral unveils Devstral 2 and Vibe CLI for autonomous code generation

On Tuesday, French AI startup Mistral AI released Devstral 2, a 123 billion parameter open-weights coding model designed to work as part of an autonomous software engineering agent, and launched a new development app called Mistral Vibe. Devstral 2 scores 72.2 percent on SWE-bench Verified, a benchmark that tests whether AI systems can solve real GitHub issues, putting it among the top-performing open-weights models.

Mistral Vibe is a command line interface similar to Claude Code, OpenAI Codex, and Gemini CLI that lets developers interact with the Devstral models directly in their terminal; the tool can scan file structures and Git status to maintain context across a project, make changes across multiple files, and execute shell commands autonomously.

Mistral released the CLI under the Apache 2.0 license. Mistral also released Devstral Small 2, a 24 billion parameter version that scores 68 percent on the same benchmark and can run locally on consumer hardware like a laptop with no Internet connection required. Both models support a 256,000 token context window, and Mistral released Devstral 2 under a modified MIT license while Devstral Small 2 is under the Apache 2.0 license; whether that context window is large or small depends on overall project complexity.

Observers caution that AI benchmarks should be taken with a large grain of salt.

Key Topics

Tech, Mistral Ai, Mistral Vibe, Swe-bench Verified