GPT-5.6 Terra
ECI#9
160GPT-5.6 Terra is a closed-weights model from OpenAI, released July 9, 2026. It has an ECI score of 160 and ranks 9th of 253 tracked models. At the time of its release, it ranked 4th of 229 tracked models.
GPT-5.6 Terra vs select alternatives
| Domain | Benchmark | GPT-5.6 Terra | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 160 | 162 | 162 | 155 | |
| Ranking | #9 | #6 | #7 | #31 | |
| Conceptual reasoning | ARC-AGI-2Best score 95% | ||||
| Games | Chess PuzzlesBest score 72% | ||||
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% |
