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Claude Sonnet 4.6 vs Pixtral 24.09

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4.6
Mistral
Pixtral 24.09
Overview
CompanyAnthropicMistral
Release dateFeb 17 2026Sep 2024
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
89.9%
Software engineering
SWE-Bench Verified
79.6%
Multimodal understanding
MMMU
Timeline
Release gapPixtral 24.09 shipped 534 days before Claude Sonnet 4.6

Which is better: Claude Sonnet 4.6 or Pixtral 24.09?

Claude Sonnet 4.6 leads Pixtral 24.09 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Pixtral 24.09 shipped 534 days before Claude Sonnet 4.6, so benchmark comparisons should account for the intervening progress.

Pixtral 24.09 is an open-source / open-weight model; Claude Sonnet 4.6 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 4.6 released?
Claude Sonnet 4.6 was released by Anthropic on Feb 17 2026.
When was Pixtral 24.09 released?
Pixtral 24.09 was released by Mistral on Sep 2024.
Is Claude Sonnet 4.6 or Pixtral 24.09 open source?
Pixtral 24.09 is an open-source / open-weight model released by Mistral. Claude Sonnet 4.6 is a proprietary model released by Anthropic.

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