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

o1-pro vs Grok 4

OpenAI
o1-pro
SpaceXAI
Grok 4
Overview
CompanyOpenAISpaceXAI
Release dateMar 19 2025Jul 9 2025
AccessProprietaryProprietary
Timeline
Release gapo1-pro shipped 112 days before Grok 4

Which is better: o1-pro or Grok 4?

o1-pro and Grok 4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1-pro shipped 112 days before Grok 4, 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 — o1-pro and Grok 4 don't publish scores on any of the same benchmarks.

Frequently asked questions

o1-pro was released by OpenAI on Mar 19 2025.

Grok 4 was released by SpaceXAI on Jul 9 2025.

Other comparisons