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Gemini 3.1 Flash vs o1-preview

Google Gemini 3.1 Flash vs OpenAI o1-preview — side-by-side specs.

Google
Gemini 3.1 Flash
OpenAI
o1-preview
Overview
CompanyGoogleOpenAI
Release dateFeb 26 2026Sep 12 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapo1-preview shipped 532 days before Gemini 3.1 Flash

Which is better: Gemini 3.1 Flash or o1-preview?

Gemini 3.1 Flash and o1-preview do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. o1-preview shipped 532 days before Gemini 3.1 Flash, 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 Gemini 3.1 Flash released?
Gemini 3.1 Flash was released by Google on Feb 26 2026.
When was o1-preview released?
o1-preview was released by OpenAI on Sep 12 2024.

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