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

Gemini 3.1 Flash vs Grok 4.20 Beta

Google
Gemini 3.1 Flash
xAI
Grok 4.20 Beta
Overview
CompanyGooglexAI
Release dateFeb 26 2026Feb 17 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapGrok 4.20 Beta shipped 9 days before Gemini 3.1 Flash

Which is better: Gemini 3.1 Flash or Grok 4.20 Beta?

Gemini 3.1 Flash and Grok 4.20 Beta don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4.20 Beta shipped 9 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 3.1 Flash and Grok 4.20 Beta don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Gemini 3.1 Flash released?
Gemini 3.1 Flash was released by Google on Feb 26 2026.
When was Grok 4.20 Beta released?
Grok 4.20 Beta was released by xAI on Feb 17 2026.

Other comparisons