Codestral

Open Weights

Mistral AI

DISCONTINUED. Mistral AI's first code-specialized open-weight model with 22B parameters. Released May 2024, designed explicitly for code generation tasks including function completion, test writing, and fill-in-the-middle code completion. Trained on diverse dataset of 80+ programming languages (Python, Java, C, C++, JavaScript, Bash, Swift, Fortran, etc.). Features 32K context window - larger than competitors' 4K-16K. Licensed under Mistral AI Non-Production License for research/testing; commercial licenses available on demand. Helps developers write and interact with code through unified instruction and completion API. Mistral deprecated the 24.05 hosted model on December 2, 2024 and retired it on June 16, 2025; a current Codestral (v25.08) exists under Mistral's Premier licence, so this record covers the retired original.

Strengths

Specialized for code generation - trained on 80+ programming languages
32K context window larger than competitors (4K-16K typical)
Fill-in-the-middle capability for inline code completion
Unified API for both instruction-following and code completion
Covers both popular (Python, Java, JavaScript) and niche (Swift, Fortran) languages
Test generation capabilities improve development workflow
Open weights enable customization and self-hosting

Caveats

DISCONTINUED - Mistral retired the codestral-2405 version on June 16, 2025
A current Codestral exists under Mistral's Premier licence and is a separate model
Non-Production License limits use cases (commercial licenses required)
22B size requires GPU for optimal performance
4K max output tokens standard for the size class
Not ideal for general-purpose tasks - code-specialized
Commercial licensing terms not publicly detailed

Vendor: Mistral AI
Context Window: 32,000 tokens
Max Output: 4,096 tokens
License: Mistral AI Non-Production License
Release Date: 2024-05-29
Modalities: text

Capabilities

Vision

Audio

Video

Tool Use

Resources

API Documentation

Pricing

Open weights (Non-Production License). Commercial licenses on demand. API pricing varies by provider