Devstral Small 1.1

by Mistral AI

Devstral Small 1.1 is a model from Mistral AI, released on July 11, 2025. It has a 128K-token context window and can generate up to 128K output tokens. API pricing is $0.1 per 1M input tokens and $0.3 per 1M output tokens.

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

Key specs

ProviderMistral AI
Release date2025-07-11
Licenseopen source
Context window128K tokens
Max output128K tokens
Input price$0.1 / 1M tokens
Output price$0.3 / 1M tokens
Intelligence Score9.2
Coding index0.6

Quick answers

What is the context window of Devstral Small 1.1?

Devstral Small 1.1 has a context window of 128K tokens, with a maximum output of 128K tokens per response.

How much does Devstral Small 1.1 cost?

Devstral Small 1.1 costs $0.1 per 1M input tokens and $0.3 per 1M output tokens through the API.

Is Devstral Small 1.1 open source?

Yes. Devstral Small 1.1 is an open model released under the open source license.

When was Devstral Small 1.1 released?

Mistral AI released Devstral Small 1.1 on July 11, 2025.

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