GPT-6.1 Sol
ECI#3
168GPT-6.1 Sol is a closed-weights model from OpenAI, released September 29, 2026. It has an ECI score of 168 and ranks 3rd of 253 tracked models.
GPT-6.1 Sol vs select alternatives
| Domain | Benchmark | GPT-6.1 Sol | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 168 | 169 | 169 | 158 | |
| Ranking | #3 | #2 | #1 – Best | #18 | |
| Games | SpireClimbBest score 26% | ||||
Chess PuzzlesBest score 76% | |||||
Earthborne Rangers (EBR-bench)Best score 76% | |||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath ErdősBest score 4% | ||||
FrontierMath Tiers 1-3 (v2)Best score 94% | |||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 83% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
