Mistral AI, the European AI unicorn, is making another breakthrough with the official release of the new open-source Devstral2 model family specifically designed for coding. It includes the flagship Devstral2 with 123B parameters and the lightweight Devstral Small2 with 24B parameters. At the same time, it also launched the open-source command-line tool Mistral Vibe CLI, supporting end-to-end automated programming. This update directly elevates the open-source coding agent to a new level. Devstral2 scored 72.2 on the authoritative SWE-bench Verified benchmark, approaching top closed-source models. Meanwhile, the API is currently free, making it a great blessing for developers.

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Devstral2 Family Launches, Covering Enterprise and Local Scenarios with Two Sizes

The Devstral2 series uses a dense Transformer architecture and supports an ultra-long context window of 256K.

- Devstral2 (123B): The enterprise-level mainstay, specializing in tool calls, multi-file editing, and complex code repository exploration. It achieved 72.2 points on the SWE-bench Verified benchmark, becoming a top open-source model.

- Devstral Small2 (24B): Lightweight and efficient, capable of running locally on consumer-grade hardware, supporting image input, suitable for privacy-sensitive or offline environments.

Both models are open source. The former uses a modified MIT license, while the latter has a more permissive Apache 2.0 license. Currently, Devstral2 is available for free through the official API, significantly lowering the barrier for developers to get started.

SWE-bench Verified 72.2 Points, New King of Open-Source Coding Agents

Devstral2 achieved a high score of 72.2% on the real GitHub problem-solving benchmark SWE-bench Verified, significantly outperforming most open-source competitors. It achieves efficient performance with fewer parameters. Compared to larger parameter closed-source models, its cost efficiency is more than seven times higher, making it particularly suitable for large-scale automated coding tasks such as code refactoring, bug fixing, and multi-file collaborative modifications.

Mistral Vibe CLI: A Versatile Coding Agent in the Terminal

The open-source CLI tool Mistral Vibe, driven by Devstral, supports direct operation of code repositories using natural language:

- Automatically scan project file structure and Git status, providing accurate context.

- Use @ to reference files, ! to execute shell commands, and slash commands for custom configuration.

- Deeply understand the entire codebase, not just the currently edited file.

- Equipped with persistent conversation history, auto-completion, and customizable themes to enhance the interactive experience.

This tool can run independently in the terminal or be integrated into IDEs, truly achieving "end-to-end automation," allowing developers to complete the entire process of exploration, modification, and execution through conversational instructions.

Ecological Integration and Open Strategy, Accelerating Distributed Intelligence

Mistral's latest release emphasizes openness and practicality, having deep collaborations with multiple open-source agent platforms, facilitating quick integration for developers. The Devstral2 series is not only suitable for enterprise production environments but also provides local deployment options for individual developers, promoting the popularization of AI coding tools.

Mistral AI's recent updates further solidify its leading position in the open-source AI field. AIbase analysts believe that Devstral2's high cost-performance ratio and the innovative interaction of Vibe CLI may accelerate the "Vibe Coding" trend, challenging the monopoly of closed-source giants. Interested developers can immediately experience it through the official API or Hugging Face. More test comparisons are coming soon, stay tuned for AIbase's in-depth reviews.