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Claude Sonnet 4 vs Pixtral 24.09

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4
Mistral
Pixtral 24.09
Overview
CompanyAnthropicMistral
Release dateMay 22 2025Sep 2024
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 gapPixtral 24.09 shipped 263 days before Claude Sonnet 4

Which is better: Claude Sonnet 4 or Pixtral 24.09?

Claude Sonnet 4 leads Pixtral 24.09 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Pixtral 24.09 shipped 263 days before Claude Sonnet 4, so benchmark comparisons should account for the intervening progress.

Pixtral 24.09 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 Pixtral 24.09 released?
Pixtral 24.09 was released by Mistral on Sep 2024.
Is Claude Sonnet 4 or Pixtral 24.09 open source?
Pixtral 24.09 is an open-source / open-weight model released by Mistral. Claude Sonnet 4 is a proprietary model released by Anthropic.

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