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

Gemma 4 vs Grok 4 Heavy

Google
Gemma 4
SpaceXAI
Grok 4 Heavy
Overview
CompanyGoogleSpaceXAI
Release dateApr 2 2026Jul 9 2025
AccessOpen WeightProprietary
Timeline
Release gapGrok 4 Heavy shipped 267 days before Gemma 4

Which is better: Gemma 4 or Grok 4 Heavy?

Gemma 4 and Grok 4 Heavy don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4 Heavy shipped 267 days before Gemma 4, so benchmark comparisons should account for the intervening progress.

Gemma 4 is open weight, while Grok 4 Heavy is proprietary.

Direct benchmark comparisons are unavailable — Gemma 4 and Grok 4 Heavy don't publish scores on any of the same benchmarks.

Frequently asked questions

Gemma 4 was released by Google on Apr 2 2026.

Grok 4 Heavy was released by SpaceXAI on Jul 9 2025.

Gemma 4 is an open weight model released by Google. Grok 4 Heavy is a proprietary model released by SpaceXAI.

Other comparisons