Codestral Model to complete, refactor and test code
Mistral Chat and reasoning models Upgrade to use mistralai/codestral-2508
Codestral 25.08 is Mistral’s 22B code model built for fast IDE-style completions, fill-in-the-middle (FIM) inserts, and targeted refactors. It is suited to developers and engineering teams who need reliable single-file edits, quick test generation, and low-latency completions in their editor or CI pipelines.
What it can do
- Searches the live web and cites sources
- Reads PDFs and documents
What people use it for
Fill in a missing function body
Provide the file with surrounding context and Codestral predicts the code between the cursor and the following lines, returning compilable suggestions that save keystrokes and reduce repetitive edits. Use it for snippets, helper functions, and API glue code.
Refactor and rename across a file
Give the model a file or a set of related files and an instruction like “extract method” or “rename variable”; Codestral produces the updated code with consistent local changes and suggested tests to validate behavior. This is practical for single-file refactors and targeted cleanups.
Generate unit tests and simple fixes
Ask Codestral to write unit tests for a function or to fix failing assertions; it generates test cases and proposes minimal patches to make them pass, speeding up TDD cycles and PR prep. Works across the most common languages.
Why it is worth it
- Low-latency completions designed for editor integrations.
- Fill-in-the-middle-trained predictions that fit cursor-based workflows.
- Handles over 80 programming languages and common build/test patterns.
- Exposes FIM endpoints that integrate with IDE plugins and automation.
Questions people ask
How do I pay for Codestral in Katteb Chat?
Katteb bills Codestral usage per message in credits. Each message using Codestral costs 3 credits; view your account page for your current credit balance and history.
Can Codestral access my project files and the web?
Yes. In Katteb Chat you may attach files and allow web access for the model to read repositories or docs. Only attach data you are comfortable sharing under your account settings and review Katteb’s data policy before use.
When should I choose Codestral over a general-purpose model?
Choose Codestral when you need fast, cursor-style completions, fill-in-the-middle code generation, or compact refactors and test generation within a file. For multi-file reasoning or high-level architectural planning, pair it with a broader chat model in Katteb.
