Author's Description
Devstral-Small-2505 is a 24B parameter agentic LLM fine-tuned from Mistral-Small-3.1, jointly developed by Mistral AI and All Hands AI for advanced software engineering tasks. It is optimized for codebase exploration, multi-file editing, and integration into coding agents, achieving state-of-the-art results on SWE-Bench Verified (46.8%). Devstral supports a 128k context window and uses a custom Tekken tokenizer. It is text-only, with the vision encoder removed, and is suitable for local deployment on high-end consumer hardware (e.g., RTX 4090, 32GB RAM Macs). Devstral is best used in agentic workflows via the OpenHands scaffold and is compatible with inference frameworks like vLLM, Transformers, and Ollama. It is released under the Apache 2.0 license.
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Mistral: Devstral Small 2505, a 24B parameter agentic LLM, demonstrates strong overall performance, particularly excelling in reliability and cost-efficiency. It boasts a perfect 100% success rate across all benchmarks, indicating exceptional reliability with no technical failures. In terms of speed, Devstral Small 2505 performs among the fastest models, ranking in the 73rd percentile. Its pricing is highly competitive, consistently placing in the 88th percentile for cost-effectiveness. Analyzing benchmark results, Devstral Small 2505 shows a standout performance in Instruction Following, achieving 100% accuracy in one instance, making it the most accurate among models of comparable speed. While its Coding (Baseline) accuracy is moderate at 82.0%, its cost and duration for this category are highly competitive. The model also exhibits strong performance in General Knowledge (98.0% accuracy) and Ethics (98.0% accuracy), though its percentile rankings in these areas are not as high. A notable weakness appears in another Instruction Following benchmark, where accuracy drops to 49.0%, suggesting some variability in complex instruction adherence. Reasoning and Email Classification show moderate accuracy. Overall, Devstral Small 2505 is a highly reliable and cost-effective model, particularly suited for agentic workflows and advanced software engineering tasks, with a strong aptitude for precise instruction following.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $0.06 |
Completion | $0.12 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
DeepInfra
|
DeepInfra | mistralai/devstral-small-2505 | 128K | $0.06 / 1M tokens | $0.12 / 1M tokens |
NextBit
|
NextBit | mistralai/devstral-small-2505 | 131K | $0.02 / 1M tokens | $0.08 / 1M tokens |
Parasail
|
Parasail | mistralai/devstral-small-2505 | 131K | $0.02 / 1M tokens | $0.08 / 1M tokens |
Mistral
|
Mistral | mistralai/devstral-small-2505 | 131K | $0.1 / 1M tokens | $0.3 / 1M tokens |
Nebius
|
Nebius | mistralai/devstral-small-2505 | 128K | $0.08 / 1M tokens | $0.24 / 1M tokens |
Chutes
|
Chutes | mistralai/devstral-small-2505 | 131K | $0.02 / 1M tokens | $0.08 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by mistralai
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
Mistral: Mistral Medium 3.1 | Aug 13, 2025 | — | 262K |
Text input
Image input
Text output
|
★★ | ★★★★ | $$$$ |
Mistral: Codestral 2508 | Aug 01, 2025 | ~2.5B | 256K |
Text input
Text output
|
★★ | ★★ | $$$ |
Mistral: Devstral Medium | Jul 10, 2025 | — | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$ |
Mistral: Devstral Small 1.1 | Jul 10, 2025 | ~24B | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$ |
Mistral: Mistral Small 3.2 24B | Jun 20, 2025 | 24B | 131K |
Text input
Image input
Text output
|
★★★★ | ★★★★ | $$ |
Mistral: Magistral Small 2506 | Jun 10, 2025 | ~24B | 40K |
Text input
Text output
|
★★ | ★★★ | $$$$ |
Mistral: Magistral Medium 2506 | Jun 07, 2025 | — | 40K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
Mistral: Mistral Medium 3 | May 07, 2025 | — | 131K |
Text input
Image input
Text output
|
★★★ | ★★★★★ | $$$$ |
Mistral: Mistral Small 3.1 24B | Mar 17, 2025 | 24B | 131K |
Text input
Image input
Text output
|
★★★★ | ★★★★ | $$ |
Mistral: Saba | Feb 17, 2025 | ~24B | 32K |
Text input
Text output
|
★★★ | ★★★★ | $$ |
Mistral: Mistral Small 3 | Jan 30, 2025 | 24B | 32K |
Text input
Text output
|
★★★★★ | ★★★★★ | $ |
Mistral: Codestral 2501 | Jan 14, 2025 | ~2.5B | 262K |
Text input
Text output
|
★★★ | ★★★ | $$$ |
Mistral Large 2411 | Nov 18, 2024 | ~32B | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
Mistral Large 2407 | Nov 18, 2024 | ~32B | 131K |
Text input
Text output
|
★★★★ | ★★★★ | $$$$ |
Mistral: Pixtral Large 2411 | Nov 18, 2024 | ~124B | 131K |
Text input
Image input
Text output
|
★★ | ★★★★ | $$$$$ |
Mistral: Ministral 3B | Oct 16, 2024 | 3B | 32K |
Text input
Text output
|
★★★★★ | ★★★ | $ |
Mistral: Ministral 8B | Oct 16, 2024 | 8B | 128K |
Text input
Text output
|
★★★ | ★★★ | $$ |
Mistral: Pixtral 12B | Sep 09, 2024 | 12B | 32K |
Text input
Image input
Text output
|
★★★★ | ★★ | $$ |
Mistral: Mistral Nemo | Jul 18, 2024 | ~12B | 131K |
Text input
Text output
|
★★★★ | ★★ | $ |
Mistral: Mistral 7B Instruct | May 26, 2024 | 7B | 32K |
Text input
Text output
|
★★★★★ | ★★ | $$ |
Mistral: Mistral 7B Instruct v0.3 | May 26, 2024 | 7B | 32K |
Text input
Text output
|
★★★★★ | ★★ | $$ |
Mistral: Mixtral 8x22B Instruct | Apr 16, 2024 | 22B | 65K |
Text input
Text output
|
★★★ | ★★ | $$$$ |
Mistral Large | Feb 25, 2024 | ~32B | 128K |
Text input
Text output
|
★★★★ | ★★★ | $$$$ |
Mistral Medium Unavailable | Jan 09, 2024 | — | 32K |
Text input
Text output
|
★★★★ | ★★★ | $$$$ |
Mistral Tiny | Jan 09, 2024 | ~7B | 32K |
Text input
Text output
|
★★★★ | ★★ | $$$ |
Mistral Small | Jan 09, 2024 | ~22B | 32K |
Text input
Text output
|
★★★★ | ★★ | $$$ |
Mistral: Mistral 7B Instruct v0.2 Unavailable | Dec 27, 2023 | 7B | 32K |
Text input
Text output
|
★★★★★ | ★★ | $$$ |
Mistral: Mixtral 8x7B Instruct | Dec 09, 2023 | 56B | 32K |
Text input
Text output
|
★★★★★ | ★★ | $$ |
Mistral: Mistral 7B Instruct v0.1 | Sep 27, 2023 | 7B | 2K |
Text input
Text output
|
★★★★ | ★★ | $$ |