GPT-5.6 Sol
ECI#8
162GPT-5.6 Sol is a closed-weights model from OpenAI, released July 9, 2026. It has an ECI score of 162 and ranks 8th of 253 tracked models. At the time of its release, it ranked 3rd of 229 tracked models.
GPT-5.6 Sol vs select alternatives
| Domain | Benchmark | GPT-5.6 Sol | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 162 | 162 | 162 | 155 | |
| Ranking | #8 | #6 | #7 | #31 | |
| Games | Chess PuzzlesBest score 72% | ||||
Earthborne Rangers (EBR-bench)Best score 76% | |||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath ErdősBest score 3% | ||||
FrontierMath Tiers 1-3 (v2)Best score 94% | |||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 83% | ||||
| Software engineering | MirrorCodeBest score 77% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
