Codestral

Codestral is a Mistral AI language model specialized in code generation, released on 29 May 2024. It has 22 billion parameters and is designed for programming tasks, including code completion and the fill-in-the-middle (FIM) technique, which completes a missing fragment using context both before and after the insertion point.

The model was trained on more than 80 programming languages — from popular ones (Python, Java, C, C++, JavaScript, Bash) to more niche ones (Swift, Fortran). It supports a 32K-token context window, which helps with repository-level work (including long-range code completion).

Codestral is an open-weights model released under the Mistral AI Non-Production License (MNPL) — for research and testing, with a separate commercial license available on request. Weights can be downloaded from Hugging Face and the model can be run locally (e.g. via vLLM) or used through the dedicated codestral.mistral.ai endpoint and the Mistral API (la Plateforme).

The model integrates with developer tooling: IDE plugins (Continue.dev, Tabnine for VS Code and JetBrains) and application frameworks (LlamaIndex, LangChain). Codestral is positioned as a model for efficient developer assistance.