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Gemini 1.0 Ultra vs o3

Google Gemini 1.0 Ultra vs OpenAI o3 — side-by-side specs.

Google
Gemini 1.0 Ultra
OpenAI
o3
Overview
CompanyGoogleOpenAI
Release dateFeb 8 2024Apr 16 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapGemini 1.0 Ultra shipped 433 days before o3

Which is better: Gemini 1.0 Ultra or o3?

Gemini 1.0 Ultra and o3 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Gemini 1.0 Ultra shipped 433 days before o3, 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 1.0 Ultra released?
Gemini 1.0 Ultra was released by Google on Feb 8 2024.
When was o3 released?
o3 was released by OpenAI on Apr 16 2025.

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