GPT-6.1 Sol
ECI#5
168GPT-6.1 Sol is a closed-weights model from OpenAI, released September 29, 2026. It has an ECI score of 168 and ranks 5th of 240 tracked models. At the time of its release, it ranked 3rd of 228 tracked models.
GPT-6.1 Sol vs select alternatives
| Domain | Benchmark | GPT-6.1 Sol | |||
|---|---|---|---|---|---|
ECI scoreBest score 173 | 168 | 169 | 169 | 159 | |
| Ranking | #5 | #3 | #4 | #23 | |
| Games | SpireClimbBest score 34% | ||||
Chess PuzzlesBest score 79% | |||||
Mystery Game PuzzlesBest score 90% | |||||
Earthborne Rangers (EBR-bench)Best score 90% | |||||
| Mathematics | FrontierMath ErdősBest score 4% | ||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 90% | ||||
| Software engineering | MirrorCodeBest score 98% | ||||
| World knowledge | SimpleQA VerifiedBest score 94% |
