GPT-5 vs o3
OpenAI GPT-5 | OpenAI o3 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | OpenAI |
| Release date | Aug 7 2025 | Apr 16 2025 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 21% | 26%Best |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1394 | — |
| Timeline | ||
| Release gap | o3 shipped 113 days before GPT-5 | |
Which is better: GPT-5 or o3?
o3 leads GPT-5 on 1 of the 1 benchmark they both report (BullshitBench v2). o3 shipped 113 days before GPT-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.
On BullshitBench v2, o3 leads at 26% vs GPT-5 at 21%.
Frequently asked questions
GPT-5 was released by OpenAI on Aug 7 2025.
o3 was released by OpenAI on Apr 16 2025.