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Composer 1.5 vs Gemini 3.1 Pro

0 vs 2 benchmarks won

Cursor
Composer 1.5
Google
Gemini 3.1 Pro
Overview
CompanyCursorGoogle
Release dateFeb 8 2026Feb 19 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
94.3%
Software engineering
SWE-Bench Verified
80.6%
Multimodal understanding
MMMU
Timeline
Release gapComposer 1.5 shipped 11 days before Gemini 3.1 Pro

Which is better: Composer 1.5 or Gemini 3.1 Pro?

Gemini 3.1 Pro leads Composer 1.5 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Composer 1.5 shipped 11 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

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 1.5 released?
Composer 1.5 was released by Cursor on Feb 8 2026.
When was Gemini 3.1 Pro released?
Gemini 3.1 Pro was released by Google on Feb 19 2026.

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