GPT-5 scores 37.2 on the Respan Index (#54), ahead of GLM-5.1 at 34.4 (#55). They split the 10 benchmarks both report evenly. GLM-5.1 is 1.6x cheaper per token at list price. GPT-5 has the larger context window (400K tokens).
* Estimated: no published scores in that category. How the Respan Index works
| 50.1% |
| SWE-bench Verified (Epoch AI) | 74.2% | 73.6% |
| WeirdML (Håvard Tveit Ihle) | 57.1% | 60.7% |
| LMArena Elo | 1462 | 1435 |
| LMArena WebDev (LMArena) | 1509 | 1417 |
| SimpleBench (SimpleBench) | 55.1% | 56.7% |
Higher is better. Each score links to where it was published.