Mistral AI has launched Devstral 2, a subsequent technology coding mannequin household for software program engineering brokers, along with Mistral Vibe CLI, an open supply command line coding assistant that runs contained in the terminal or IDEs that help the Agent Communication Protocol.
Devstral 2 and Devstral Small 2, mannequin sizes, context and benchmarks
Devstral 2 is a 123B parameter dense transformer with a 256K token context window. It reaches 72.2 % on SWE-bench Verified, which locations it among the many strongest open weight fashions for software program engineering duties. The mannequin is launched as open weights below a modified MIT license and is at the moment free to make use of through the Mistral API.
Devstral Small 2 is a 24B parameter mannequin with the identical 256K context window. It scores 68.0 % on SWE-bench Verified and sits within the vary of fashions which can be as much as 5 occasions bigger in parameter rely. It’s launched below the Apache 2.0 license, which is a normal permissive license for manufacturing use.
Each fashions are described as open supply and permissively licensed and are positioned as state-of-the-art coding fashions for agentic workloads. Mistral stories that Devstral 2 is as much as 7 occasions extra price environment friendly than Claude Sonnet on actual world coding duties at comparable high quality, which is essential for steady agent workloads.
By way of mannequin dimension relative to frontier methods, Devstral 2 and Devstral Small 2 are 5 occasions and 28 occasions smaller than DeepSeek V3.2, and eight occasions and 41 occasions smaller than Kimi K2.
Constructed for manufacturing grade coding workflows
Devstral 2 is designed for software program engineering brokers that must discover repositories, monitor dependencies and orchestrate edits throughout many information whereas sustaining structure degree context. The mannequin can detect failures, retry with corrections and help duties akin to bug fixing or modernization of legacy methods at repository scale.
Mistral states that Devstral 2 could be positive tuned to favor particular programming languages or to optimize for very massive enterprise codebases. Devstral Small 2 brings the identical design targets to a smaller footprint that’s appropriate for native deployment, tight suggestions loops and absolutely personal runtimes. It additionally helps picture inputs and may drive multimodal brokers that should motive over each code and visible artifacts akin to diagrams or screenshots.
Human evaluations in opposition to DeepSeek V3.2 and Claude Sonnet 4.5
To check actual world coding habits, Mistral evaluated Devstral 2 in opposition to DeepSeek V3.2 and Claude Sonnet 4.5 utilizing duties scaffolded via the Cline agent device. In these human evaluations Devstral 2 reveals a transparent benefit over DeepSeek V3.2 with a 42.8 % win charge versus a 28.6 % loss charge.
Mistral Vibe CLI, a terminal native coding agent
Mistral Vibe CLI is an open supply command line coding assistant written in Python and powered by Devstral fashions. It explores, modifies and executes adjustments throughout a codebase utilizing pure language within the terminal, or inside IDEs that help the Agent Communication Protocol akin to Zed the place it’s out there as an extension.The undertaking is launched below the Apache 2.0 license on GitHub.
Vibe CLI offers a chat type interface on high of a number of key instruments:
- Venture conscious context, it scans the file construction and Git standing to construct a working view of the repository.
- Good references, it helps
@autocomplete for information,!for shell instructions and slash instructions for configuration adjustments. - Multi file orchestration, it causes over the total codebase, not solely the lively buffer, to coordinate structure degree adjustments and scale back pull request cycle time.
- Persistent historical past, autocompletion and themes tuned for day by day use within the terminal.
Builders configure Vibe CLI via a easy config.toml file the place they will level to Devstral 2 through the Mistral API or to different native or distant fashions. The device helps programmatic runs, auto approval toggles for device execution and granular permissions in order that dangerous operations in delicate repositories require affirmation.
Key Takeaways
- Devstral 2 is a 123B parameter dense coding mannequin with 256K context, it reaches 72.2 % on SWE bench Verified and is launched as open weights below a modified MIT license.
- Devstral Small 2 has 24B parameters with the identical 256K context, it scores 68.0 % on SWE bench Verified and makes use of an Apache 2.0 license for simpler manufacturing adoption.
- Each Devstral fashions are optimized for agentic coding workloads, they’re designed to discover full repositories, monitor dependencies and apply multi file edits with failure detection and retries.
- Mistral Vibe CLI is an open supply Python based mostly terminal native coding agent that connects to Devstral, it offers undertaking conscious context, sensible references and multi file orchestration via a chat type interface within the terminal or IDEs that help the Agent Communication Protocol.
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