GPT-6.1 Sol
ECI#3
166GPT-6.1 Sol is a closed-weights model from OpenAI, released September 29, 2026. It has an ECI score of 166 and ranks 3rd of 257 tracked models.
GPT-6.1 Sol vs select alternatives
| Domain | Benchmark | GPT-6.1 Sol | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 166 | 166 | 167 | 157 | |
| Ranking | #3 | #2 | #1 – Best | #15 | |
| Games | Chess PuzzlesBest score 72% | ||||
Earthborne Rangers (EBR-bench)Best score 76% | |||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 83% | ||||
| Science | GPQA DiamondBest score 96% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
