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

o1-pro vs Grok 4.5

OpenAI
o1-pro
SpaceXAI
Grok 4.5
Overview
CompanyOpenAISpaceXAI
Release dateMar 19 2025Jul 8 2026
AccessProprietaryProprietary
Benchmarks
Agentic coding
SWE-Bench Pro
64.7%
Multilingual coding
SWE-Bench Multilingual
78%
Agentic coding
DeepSWE 1.0
62%
Agentic terminal coding
Terminal-Bench 2.1
83.3%
Timeline
Release gapo1-pro shipped 476 days before Grok 4.5

Which is better: o1-pro or Grok 4.5?

o1-pro and Grok 4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1-pro shipped 476 days before Grok 4.5, 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 4.5 don't publish scores on any of the same benchmarks.

Frequently asked questions

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

Grok 4.5 was released by SpaceXAI on Jul 8 2026.

Other comparisons