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Language model

Devstral Small

Mistral AI

Released
July 10, 2025
Data date
September 26, 2026

Devstral Small is the 24B coding-agent checkpoint released in July 2025. It understands codebases, calls functions, and processes 128,000 tokens of context. Alongside Mistral’s function format, it supports XML-based tool descriptions.

Devstral Small 2 continues the line with a larger context window and multimodal input.

Specifications and access

SpecificationValue and source
Weights
Open weightsSource
Access
Parameters
24 billionSource
Context window
128,000 tokensSource
Maximum output
128,000 tokensSource
Knowledge Cutoff
May 2025Source
License
Apache 2.0Source
Inputs
TextSource
Outputs
TextSource
Tool calling