Codestral 25.08

Codestral 25.08 is Mistral AI's updated code generation model, released August 1, 2025 as the successor to Codestral 25.01. It keeps the 256K-token context window and the fill-in-the-middle completion specialty that made the line popular with IDE copilots, with updated training data carrying a March 2025 knowledge cutoff. Mistral positions it for high-frequency, low-latency coding assistance: code completion, generation, and function calling across 80+ programming languages.

The honest picture: unlike Codestral 25.01, whose weights shipped under Mistral's research license, 25.08 is served API-only with no downloadable weights as of October 2026, so it is proprietary for catalog purposes. Mistral's API pricing sits at roughly $0.30 per million input tokens and $0.90 per million output tokens. It is a completion specialist rather than an agentic coder, so teams wanting autonomous multi-file refactoring should pair it with an agent harness rather than expecting it to plan work itself.