GPT-6.1 Sol scores 69.4 on the Respan Index (#4), ahead of GPT-5.6 Sol at 60.6 (#10). GPT-6.1 Sol leads on 18 of the 23 benchmarks both report. GPT-6.1 Sol is 2.0x cheaper per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| 89.1% |
| 93.7% |
| Furniture Assembly (Epoch AI) | 56.7% | 80% |
| GPQA Diamond | 94.6% | 95.4% |
| LiveBench Agentic Coding (LiveBench) | 56.2% | 56.8% |
| LiveBench Coding (LiveBench) | 83.9% | 80.7% |
| LiveBench Data Analysis (LiveBench) | 79.8% | 82.7% |
| LiveBench Instruction Following (LiveBench) | 71.8% | 74.2% |
| LiveBench Language (LiveBench) | 87.7% | 90.1% |
| LiveBench Mathematics (LiveBench) | 96.2% | 96.8% |
| LiveBench Reasoning (LiveBench) | 91.7% | 92.6% |
| Mystery Game Puzzles (Epoch AI) | 58% | 80% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 100% | 100% |
| SAGE (Vals AI) | 52.6% | 46.5% |
| SimpleQA Verified | 69.7% | 73.9% |
| Terminal-Bench 4.0 (Vals AI) | 37.9% | 55.1% |
| LMArena Agent (LMArena) | 0.0645 | 0.1123 |
| LMArena Elo | 1484 | 1483 |
| LMArena Vision (LMArena) | 1285 | 1291 |
| SimpleBench (SimpleBench) | 71.7% | 82.9% |
Higher is better. Each score links to where it was published.