GPT-5.1 scores 32.4 on the Respan Index (#62), ahead of Inkling at 30.1 (#64). GPT-5.1 leads on 5 of the 9 benchmarks both report. Inkling is 2.0x cheaper per token at list price. Inkling has the larger context window (1M tokens).
* Estimated: no published scores in that category. How the Respan Index works
| 43.9% |
| WeirdML (Håvard Tveit Ihle) | 60.8% | 32.3% |
| LMArena Elo | 1423 | 1441 |
| LMArena WebDev (LMArena) | 1395 | 1413 |
| SimpleBench (SimpleBench) | 53.2% | 50% |
Higher is better. Each score links to where it was published.