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Devstral Small 1.1

Mistral AI

Devstral Small 1.1 (also called devstral-small-2507) is based on the Mistral-Small-3.1 base model and contains approximately 24 billion parameters. It supports a 128 thousand token context window, enabling it to handle multi-file code inputs and long prompts typical of software development workflows. The model is specifically fine-tuned for structured outputs, including XML and function calling formats. This makes it compatible with agentic frameworks such as OpenHands and suitable for program navigation, multi-step editing, and code search tasks. It is licensed under Apache 2.0 and available for both research and commercial use.

Key Specifications

Parameters
24.0B
Context
128.0K
Release Date
July 11, 2025
Average Score
53.6%

Timeline

Key dates in the model's history
Announcement
July 11, 2025
Last Update
July 19, 2025
Today
March 25, 2026

Technical Specifications

Parameters
24.0B
Training Tokens
-
Knowledge Cutoff
-
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$0.10
Output (per 1M tokens)
$0.30
Max Input Tokens
128.0K
Max Output Tokens
128.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Programming

Programming skills tests
SWE-Bench Verified
OpenHands scaffold Structure OpenHands - this set and prompts, model track its reasoning and step by step solve tasks. This structure helps model and correct errors in thinking, to and accuracy reasoning. OpenHands encourages model aloud, various approaches and perform its solutions, that especially useful for complex tasks, which not solve directly. has following structure: 1. Model indicates : "I ", "I " or "I ". 2. Then model its thoughts, or 3. Model applies approach, problem with different sides. 4. value has evaluation and errors. consists in that, that model explicitly its mode thinking and should in each mode, more reasoningSelf-reported
53.6%

License & Metadata

License
apache_2_0
Announcement Date
July 11, 2025
Last Updated
July 19, 2025

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