Mistral Open-Sources Codestral 2 Coding Model
Mistral AI has open-sourced Codestral 2, a 22B parameter coding model that achieves 94.1% on HumanEval and supports over 80 programming languages. The model is available under the Apache 2.0 license.
Mistral AI has released Codestral 2 under the Apache 2.0 license, making it one of the most capable open-source coding models available. The 22B parameter model achieves 94.1% on HumanEval, 87.3% on SWE-bench Lite, and supports over 80 programming languages including Python, JavaScript, Rust, Go, and lesser-supported languages like Haskell and Erlang.
Codestral 2 features a 128K token context window, allowing it to understand and work with large codebases. The model excels at fill-in-the-middle completion, code explanation, bug detection, and test generation. In Mistral's internal evaluations, Codestral 2 matched GPT-5's coding performance on most benchmarks while being small enough to run on a single high-end GPU.
The model has been optimized for integration with code editors, with response latency under 100ms for typical completion requests on an A100 GPU. This makes it practical for real-time code assistance, and several editor plugins including Cursor, Continue, and VS Code extensions have already added Codestral 2 support.
Mistral has also released a fine-tuning kit that allows developers to adapt Codestral 2 to specific codebases, frameworks, or coding conventions. Early adopters report that fine-tuning on a company's codebase improves relevant suggestion accuracy by 25-40%.
The Apache 2.0 license allows unrestricted commercial use, a strategic move by Mistral to build ecosystem adoption. The model is available on Hugging Face, Ollama, and through Mistral's API platform.
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