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Composer vs Mistral Small 3

Cursor Composer vs Mistral Mistral Small 3 — side-by-side specs.

Cursor
Composer
Mistral
Mistral Small 3
Overview
CompanyCursorMistral
Release dateOct 29 2025Jan 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 shipped 301 days before Composer

Which is better: Composer or Mistral Small 3?

Composer and Mistral Small 3 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Mistral Small 3 shipped 301 days before Composer, so benchmark comparisons should account for the intervening progress.

Mistral Small 3 is an open-source / open-weight model; Composer 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 released?
Composer was released by Cursor on Oct 29 2025.
When was Mistral Small 3 released?
Mistral Small 3 was released by Mistral on Jan 2025.
Is Composer or Mistral Small 3 open source?
Mistral Small 3 is an open-source / open-weight model released by Mistral. Composer is a proprietary model released by Cursor.

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