Claude 1 vs o3-pro
Anthropic Claude 1 | OpenAI o3-pro | |
|---|---|---|
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Mar 14 2023 | Jun 10 2025 |
| Access | Proprietary | Proprietary |
| Timeline | ||
| Release gap | Claude 1 shipped 819 days before o3-pro | |
Which is better: Claude 1 or o3-pro?
Claude 1 and o3-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 1 shipped 819 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 1 and o3-pro don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 1 was released by Anthropic on Mar 14 2023.
o3-pro was released by OpenAI on Jun 10 2025.