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

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Gemini 3.1 Pro vs o3

2 vs 0 benchmarks won

Google
Gemini 3.1 Pro
OpenAI
o3
Overview
CompanyGoogleOpenAI
Release dateFeb 19 2026Apr 16 2025
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 gapo3 shipped 309 days before Gemini 3.1 Pro

Which is better: Gemini 3.1 Pro or o3?

Gemini 3.1 Pro leads o3 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). o3 shipped 309 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 Gemini 3.1 Pro released?
Gemini 3.1 Pro was released by Google on Feb 19 2026.
When was o3 released?
o3 was released by OpenAI on Apr 16 2025.

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