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Claude Opus 4.6 vs Mistral Large 3

2 vs 0 benchmarks won

Anthropic
Claude Opus 4.6
Mistral
Mistral Large 3
Overview
CompanyAnthropicMistral
Release dateFeb 5 2026Dec 2 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
91.3%
Software engineering
SWE-Bench Verified
80.8%
Multimodal understanding
MMMU
Timeline
Release gapMistral Large 3 shipped 65 days before Claude Opus 4.6

Which is better: Claude Opus 4.6 or Mistral Large 3?

Claude Opus 4.6 leads Mistral Large 3 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Large 3 shipped 65 days before Claude Opus 4.6, so benchmark comparisons should account for the intervening progress.

Mistral Large 3 is an open-source / open-weight model; Claude Opus 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 Opus 4.6 released?
Claude Opus 4.6 was released by Anthropic on Feb 5 2026.
When was Mistral Large 3 released?
Mistral Large 3 was released by Mistral on Dec 2 2025.
Is Claude Opus 4.6 or Mistral Large 3 open source?
Mistral Large 3 is an open-source / open-weight model released by Mistral. Claude Opus 4.6 is a proprietary model released by Anthropic.

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