AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

Home/Compare/Gemini 2.5 Pro vs o3

Gemini 2.5 Pro vs o3

3 vs 0 benchmarks won

Google
Gemini 2.5 Pro
OpenAI
o3
Overview
CompanyGoogleOpenAI
Release dateMar 25 2025Apr 16 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
86.4%
Software engineering
SWE-Bench Verified
59.6%
Multimodal understanding
MMMU
68%
Timeline
Release gapGemini 2.5 Pro shipped 22 days before o3

Which is better: Gemini 2.5 Pro or o3?

Gemini 2.5 Pro leads o3 on 3 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Gemini 2.5 Pro shipped 22 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 2.5 Pro released?
Gemini 2.5 Pro was released by Google on Mar 25 2025.
When was o3 released?
o3 was released by OpenAI on Apr 16 2025.

Other comparisons