GPT-6.1 Sol scores 69.4 on the Respan Index (#4), ahead of GPT-6 Sol at 62.8 (#8). GPT-6.1 Sol leads on 20 of the 22 benchmarks both report. Both cost about the same per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| Furniture Assembly (Epoch AI) |
| 80% |
| 58.3% |
| GPQA Diamond | 95.4% | 94.3% |
| LiveBench Agentic Coding (LiveBench) | 56.8% | 52.9% |
| LiveBench Coding (LiveBench) | 80.7% | 81.8% |
| LiveBench Data Analysis (LiveBench) | 82.7% | 81.2% |
| LiveBench Instruction Following (LiveBench) | 74.2% | 68.6% |
| LiveBench Language (LiveBench) | 90.1% | 85.3% |
| LiveBench Mathematics (LiveBench) | 96.8% | 96.4% |
| LiveBench Reasoning (LiveBench) | 92.6% | 88.7% |
| Mystery Game Puzzles (Epoch AI) | 80% | 56% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 100% | 100% |
| SAGE (Vals AI) | 46.5% | 44.8% |
| SimpleQA Verified | 73.9% | 60.7% |
| Terminal-Bench 4.0 (Vals AI) | 55.1% | 44.4% |
| LMArena Agent (LMArena) | 0.1123 | 0.0971 |
| LMArena Elo | 1483 | 1457 |
| LMArena WebDev (LMArena) | 1758 | 1689 |
| SimpleBench (SimpleBench) | 82.9% | 73.1% |
Higher is better. Each score links to where it was published.