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MistralAIProprietary
Devstral Medium
Devstral Medium is a programming-specialized foundation model developed by MistralAI. It is equipped with a wide 128K context window, making it suitable for handling large codebases.
Parameters
Undisclosed
Context Window
128K
License
Proprietary
Release Date
2025-07-10
API Pricing
API pricing for this model is not yet available
Strengths
- ・Advanced code generation capability
- ・Long 128K context retention
- ・Specialization for programming
Weaknesses
- ・Non-public license
- ・Closed operating environment
- ・Unclear performance on general tasks
Use Cases
- ・Automated generation of complex code
- ・Analysis of large-scale projects
- ・Efficient bug fixing and verification
Deep Analysis
SWE-Bench Verified
61.6%
Surpasses Gemini 2.5 Pro and GPT-4.1
Context Window
128K tokens
Pricing
$0.40/$2.00 per 1M tokens
GPQA Diamond
49.2%
Release Date
July 10, 2025
Strengths
- ・Strong SWE-Bench Verified (61.6%) at low cost
- ・Cost-effective at $0.40/$2.00 per 1M tokens
- ・Supports tool use and enterprise deployment
Weaknesses
- ・Weak reasoning and math benchmarks
- ・API-only, not open-weight
- ・Low AIME score (6.7%)
Competitor Comparison
| Model | SWE | GPQA | Price |
|---|---|---|---|
| Devstral Small 1.1 | 53.6% | 41.4% | $0.10/$0.30 |
| Claude 3.5 Haiku | 40.6% | $0.80/$4.00 | |
| GPT-4.1-mini | 23.6% | $0.40/$1.60 |
Devstral Medium is a high-performance coding model from Mistral AI and All Hands AI. Achieves 61.6% SWE-Bench Verified, surpassing Gemini 2.5 Pro and GPT-4.1 at fraction of cost.
Sources
Analysis generated: 2026-05-24