Codestral (latest)

Codestral is a large language model created by Mistral AI and tailored specifically for software development workflows. Independent coverage describes it as a 22-billion-parameter model released in May 2024, trained to write, complete, and reason about code rather than serve as a general-purpose chatbot. Its design centers on code generation and comprehension, giving it a clear specialization compared with broader conversational models in the same weight class.

Across the languages it covers, Codestral is reported to support more than 80 programming environments, including Python, Java, C++, JavaScript, Bash, Swift, and Fortran, making it useful for polyglot codebases and mixed-language projects. Its fill-in-the-middle behavior, combined with integration into popular developer tools, positions it well for IDE-style code completion and refactoring tasks. Mistral AI also documents the model in its official cookbook ecosystem through a self-correction pattern that pairs Codestral with LangChain and LangGraph, illustrating how developers can build tool-using code-assistant pipelines on top of it. The combination of broad language coverage, code-focused training, and first-party documentation makes Codestral a practical fit for teams that want a specialized coding model rather than a general assistant.