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Composer 2 vs Mistral Small 3.1

Cursor Composer 2 vs Mistral Mistral Small 3.1 — side-by-side specs.

Cursor
Composer 2
Mistral
Mistral Small 3.1
Overview
CompanyCursorMistral
Release dateMar 20 2026Mar 17 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapMistral Small 3.1 shipped 368 days before Composer 2

Which is better: Composer 2 or Mistral Small 3.1?

Composer 2 and Mistral Small 3.1 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Mistral Small 3.1 shipped 368 days before Composer 2, so benchmark comparisons should account for the intervening progress.

Mistral Small 3.1 is an open-source / open-weight model; Composer 2 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 Composer 2 released?
Composer 2 was released by Cursor on Mar 20 2026.
When was Mistral Small 3.1 released?
Mistral Small 3.1 was released by Mistral on Mar 17 2025.
Is Composer 2 or Mistral Small 3.1 open source?
Mistral Small 3.1 is an open-source / open-weight model released by Mistral. Composer 2 is a proprietary model released by Cursor.

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