GPT-6 Luna
ECI#27
156GPT-6 Luna is a closed-weights model from OpenAI, released September 22, 2026. It has an ECI score of 156 and ranks 27th of 260 tracked models. At the time of its release, it ranked 23rd of 255 tracked models.
GPT-6 Luna vs select alternatives
| Domain | Benchmark | GPT-6 Luna | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 156 | 156 | 156 | 156 | |
| Ranking | #27 | #29 | #25 | #28 | |
| Conceptual reasoning | ARC-AGI-2Best score 95% | ||||
| Games | Chess PuzzlesBest score 74% | ||||
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% |
