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Claude Sonnet 4 vs Devstral Small 2 (24B)

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4
Mistral
Devstral Small 2 (24B)
Overview
CompanyAnthropicMistral
Release dateMay 22 2025Dec 9 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
75.4%
Software engineering
SWE-Bench Verified
72.7%
Multimodal understanding
MMMU
Timeline
Release gapClaude Sonnet 4 shipped 201 days before Devstral Small 2 (24B)

Which is better: Claude Sonnet 4 or Devstral Small 2 (24B)?

Claude Sonnet 4 leads Devstral Small 2 (24B) on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude Sonnet 4 shipped 201 days before Devstral Small 2 (24B), so benchmark comparisons should account for the intervening progress.

Devstral Small 2 (24B) is an open-source / open-weight model; Claude Sonnet 4 is proprietary.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Claude Sonnet 4 released?
Claude Sonnet 4 was released by Anthropic on May 22 2025.
When was Devstral Small 2 (24B) released?
Devstral Small 2 (24B) was released by Mistral on Dec 9 2025.
Is Claude Sonnet 4 or Devstral Small 2 (24B) open source?
Devstral Small 2 (24B) is an open-source / open-weight model released by Mistral. Claude Sonnet 4 is a proprietary model released by Anthropic.

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