Claude 2 vs o3-pro
Anthropic Claude 2 | OpenAI o3-pro | |
|---|---|---|
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Jul 11 2023 | Jun 10 2025 |
| Access | Proprietary | Proprietary |
| Timeline | ||
| Release gap | Claude 2 shipped 700 days before o3-pro | |
Which is better: Claude 2 or o3-pro?
Claude 2 and o3-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2 shipped 700 days before o3-pro, 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 — Claude 2 and o3-pro don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 2 was released by Anthropic on Jul 11 2023.
o3-pro was released by OpenAI on Jun 10 2025.