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

Home/Compare/Gemini 2.5 Flash vs Gemini 3.1 Flash

Gemini 2.5 Flash vs Gemini 3.1 Flash

Google Gemini 2.5 Flash vs Google Gemini 3.1 Flash — side-by-side specs.

Google
Gemini 2.5 Flash
Google
Gemini 3.1 Flash
Overview
CompanyGoogleGoogle
Release dateApr 17 2025Feb 26 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapGemini 2.5 Flash shipped 315 days before Gemini 3.1 Flash

Which is better: Gemini 2.5 Flash or Gemini 3.1 Flash?

Gemini 2.5 Flash and Gemini 3.1 Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 2.5 Flash shipped 315 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 — Gemini 2.5 Flash and Gemini 3.1 Flash don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Gemini 2.5 Flash released?
Gemini 2.5 Flash was released by Google on Apr 17 2025.
When was Gemini 3.1 Flash released?
Gemini 3.1 Flash was released by Google on Feb 26 2026.

Other comparisons