Mistral AI has updated Codestral to version 25.01, their specialised code generation model. The update brings meaningful improvements to fill-in-the-middle (FIM) completion — the capability that allows the model to insert code given both the prefix and suffix context around a cursor position. This makes it particularly well-suited for IDE plugin integration where the model needs to complete code mid-function rather than simply appending to the end. Codestral 25.01 also shows strong performance on the recently published Multi-SWE-bench evaluation, and Mistral has added support for 30 additional programming languages including Kotlin, Swift, and Elixir.