GPT-6.1 Sol scores 69.4 on the Respan Index (#4), ahead of Kimi K2.6 at 34.4 (#55). GPT-6.1 Sol leads on 19 of the 20 benchmarks both report. Kimi K2.6 is 2.3x cheaper per token at list price. GPT-6.1 Sol has the larger context window (1.1M tokens).
* Estimated: no published scores in that category. How the Respan Index works
| Furniture Assembly (Epoch AI) |
| 80% |
| 21.7% |
| GPQA Diamond | 95.4% | 90.8% |
| LiveBench Agentic Coding (LiveBench) | 56.8% | 46.9% |
| LiveBench Coding (LiveBench) | 80.7% | 78.6% |
| LiveBench Data Analysis (LiveBench) | 82.7% | 65.1% |
| LiveBench Instruction Following (LiveBench) | 74.2% | 64.4% |
| LiveBench Language (LiveBench) | 90.1% | 75.1% |
| LiveBench Mathematics (LiveBench) | 96.8% | 84.3% |
| LiveBench Reasoning (LiveBench) | 92.6% | 79.4% |
| Mystery Game Puzzles (Epoch AI) | 80% | 18% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 100% | 96.1% |
| SAGE (Vals AI) | 46.5% | 50.2% |
| SimpleQA Verified | 73.9% | 34.9% |
| LMArena Elo | 1483 | 1455 |
| LMArena Vision (LMArena) | 1291 | 1265 |
| LMArena WebDev (LMArena) | 1758 | 1509 |
Higher is better. Each score links to where it was published.