Author's Description
Devstral Medium is a high-performance code generation and agentic reasoning model developed jointly by Mistral AI and All Hands AI. Positioned as a step up from Devstral Small, it achieves 61.6% on SWE-Bench Verified, placing it ahead of Gemini 2.5 Pro and GPT-4.1 in code-related tasks, at a fraction of the cost. It is designed for generalization across prompt styles and tool use in code agents and frameworks. Devstral Medium is available via API only (not open-weight), and supports enterprise deployment on private infrastructure, with optional fine-tuning capabilities.
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Mistral's Devstral Medium is a high-performance code generation and agentic reasoning model, demonstrating strong capabilities across various benchmarks. It performs among the fastest models, ranking in the 69th percentile for speed, and offers competitive pricing, placing in the 51st percentile. Notably, Devstral Medium exhibits exceptional reliability with a 100% success rate across all benchmarks, indicating minimal technical failures. The model excels in several areas, achieving perfect accuracy in Hallucinations, General Knowledge, and Ethics, often being the most accurate at its price point and speed. It also performs perfectly in Email Classification. Its coding prowess is evident with an 88.0% accuracy in the Coding benchmark, and a respectable 90.0% in Mathematics, where it is also noted as the most accurate among models of similar speed. While strong in Instruction Following (65.0% accuracy) and Reasoning (64.0% accuracy), these areas represent relative weaknesses compared to its perfect scores in other categories. Its primary strength lies in its robust code-related performance (61.6% on SWE-Bench Verified), positioning it ahead of competitors like Gemini 2.5 Pro and GPT-4.1.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $0.4 |
Completion | $2 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
Mistral
|
Mistral | mistralai/devstral-medium-2507 | 131K | $0.4 / 1M tokens | $2 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by mistralai
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
Mistral: Mistral Medium 3.1 | Aug 13, 2025 | — | 131K |
Text input
Image input
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|
★★★ | ★★★★ | $$$$ |
Mistral: Codestral 2508 | Aug 01, 2025 | ~2.5B | 256K |
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Text output
|
★★★ | ★★ | $$$ |
Mistral: Devstral Small 1.1 | Jul 10, 2025 | ~24B | 131K |
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|
★★★★ | ★★★ | $$ |
Mistral: Mistral Small 3.2 24B | Jun 20, 2025 | 24B | 131K |
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Image input
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|
★★★★ | ★★★ | $$ |
Mistral: Magistral Small 2506 | Jun 10, 2025 | ~24B | 40K |
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|
★★★ | ★★ | $$$$ |
Mistral: Magistral Medium 2506 | Jun 07, 2025 | — | 40K |
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|
★★★ | ★★★★ | $$$$$ |
Mistral: Devstral Small 2505 | May 21, 2025 | ~24B | 128K |
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|
★★★★★ | ★★★★ | $ |
Mistral: Mistral Medium 3 | May 07, 2025 | — | 131K |
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|
★★★ | ★★★★ | $$$$ |
Mistral: Mistral Small 3.1 24B | Mar 17, 2025 | 24B | 131K |
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|
★★★★ | ★★★ | $$ |
Mistral: Saba | Feb 17, 2025 | ~24B | 32K |
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|
★★ | ★★★★ | $$ |
Mistral: Mistral Small 3 | Jan 30, 2025 | 24B | 32K |
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|
★★★★★ | ★★★★★ | $ |
Mistral: Codestral 2501 | Jan 14, 2025 | ~2.5B | 262K |
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★★★ | ★★★ | $$$ |
Mistral Large 2411 | Nov 18, 2024 | ~32B | 131K |
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|
★★★★ | ★★★★ | $$$$$ |
Mistral Large 2407 | Nov 18, 2024 | ~32B | 131K |
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|
★★★★ | ★★★★ | $$$$ |
Mistral: Pixtral Large 2411 | Nov 18, 2024 | ~124B | 131K |
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|
★★★ | ★★★★ | $$$$$ |
Mistral: Ministral 3B | Oct 16, 2024 | 3B | 32K |
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|
★★★★★ | ★★★ | $ |
Mistral: Ministral 8B | Oct 16, 2024 | 8B | 128K |
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|
★★★★ | ★★★ | $$ |
Mistral: Pixtral 12B | Sep 09, 2024 | 12B | 32K |
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|
★★★★ | ★ | $$ |
Mistral: Mistral Nemo | Jul 18, 2024 | ~12B | 131K |
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|
★★★★ | ★ | $ |
Mistral: Mistral 7B Instruct | May 26, 2024 | 7B | 32K |
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|
★★★★★ | ★★ | $$ |
Mistral: Mistral 7B Instruct v0.3 | May 26, 2024 | 7B | 32K |
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|
★★★★★ | ★★ | $$ |
Mistral: Mixtral 8x22B Instruct | Apr 16, 2024 | 22B | 65K |
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|
★★★★★ | ★★★ | $$$ |
Mistral Large | Feb 25, 2024 | ~32B | 128K |
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|
★★★★ | ★★★★ | $$$$ |
Mistral Medium Unavailable | Jan 09, 2024 | — | 32K |
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|
— | — | $$$$$ |
Mistral Tiny | Jan 09, 2024 | ~7B | 32K |
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|
★★★★ | ★★ | $$ |
Mistral Small | Jan 09, 2024 | ~22B | 32K |
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|
★★★★★ | ★★ | $$ |
Mistral: Mistral 7B Instruct v0.2 Unavailable | Dec 27, 2023 | 7B | 32K |
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|
★★★★★ | ★★ | $$$ |
Mistral: Mixtral 8x7B Instruct | Dec 09, 2023 | 56B | 32K |
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|
★★★★★ | ★★ | $$ |
Mistral: Mistral 7B Instruct v0.1 | Sep 27, 2023 | 7B | 2K |
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|
★★★★ | ★★ | $$ |