GPT-6 Sol scores 62.8 on the Respan Index (#8), ahead of GPT-5.6 Terra at 53.5 (#14). GPT-6 Sol leads on 16 of the 22 benchmarks both report. GPT-6 Sol is 1.1x cheaper per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| GPQA Diamond |
| 92.9% |
| 94.3% |
| LiveBench Agentic Coding (LiveBench) | 54.9% | 52.9% |
| LiveBench Coding (LiveBench) | 78.2% | 81.8% |
| LiveBench Data Analysis (LiveBench) | 79.3% | 81.2% |
| LiveBench Instruction Following (LiveBench) | 64.6% | 68.6% |
| LiveBench Language (LiveBench) | 82.9% | 85.3% |
| LiveBench Mathematics (LiveBench) | 94.9% | 96.4% |
| LiveBench Reasoning (LiveBench) | 90.6% | 88.7% |
| Mystery Game Puzzles (Epoch AI) | 35% | 56% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 99.7% | 100% |
| SAGE (Vals AI) | 47% | 44.8% |
| SimpleQA Verified | 43.2% | 60.7% |
| Terminal-Bench 4.0 (Vals AI) | 22.7% | 44.4% |
| Vending-Bench 2 (Andon Labs) | 7343.21 | 14427.85 |
| LMArena Agent (LMArena) | 0.004 | 0.0971 |
| LMArena Elo | 1466 | 1457 |
| DeepSWE v1.1 | 69.6% | 68.8% |
| SimpleBench (SimpleBench) | 48.9% | 73.1% |
Higher is better. Each score links to where it was published.