GPT-5.4 Pro scores 49.1 on the Respan Index (#25), ahead of Claude Opus 4.7 at 47.7 (#27). GPT-5.4 Pro leads on 6 of the 9 benchmarks both report. Claude Opus 4.7 is 6.8x cheaper per token at list price. GPT-5.4 Pro has the larger context window (1.1M tokens).
* Estimated: no published scores in that category. How the Respan Index works
| 51.7% |
| 46.3% |
| WeirdML (Håvard Tveit Ihle) | 76.4% | 57.4% |
| BrowseComp | 79.8% | 89.3% |
| Humanity's Last Exam (no tools) | 46.9% | 42.7% |
| Humanity's Last Exam (with tools) | 54.7% | 58.7% |
Higher is better. Each score links to where it was published.