GPT-5.6 Luna — benchmark results
Provider: OpenAI. Released 2026-07-09. Access: API.
Unified ELO 1917 ± 29, rank #54 of 1744 rated models, from 59 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA Long Context Reasoning | 74 | Accuracy (%) | 98.5 |
| Artificial Analysis Intelligence Index | 51.24 | Intelligence Index | 97.4 |
| Vals AI IOI | 72.92 | Accuracy (%) | 96.6 |
| AA CritPt | 20.57 | Accuracy (%) | 96.3 |
| AA GPQA Diamond | 91.11 | Accuracy (%) | 96.2 |
| AA Omniscience - Software Engineering (SWE) - TypeScript | 77.78 | Accuracy (%) | 95.9 |
| AA Humanity's Last Exam | 37.21 | Accuracy (%) | 95.8 |
| AA SciCode | 52.55 | Accuracy (%) | 95.8 |
| OTIS Mock AIME 2024-25 | 98.33 | Accuracy (%) | 95.8 |
| GDPval-AA | 1592 | Elo | 95.2 |
| AA GDPval | 1591.81 | ELO | 95 |
| Vals AI Terminal-Bench 2.1 | 79.03 | Accuracy (%) | 94.9 |
Interactive version: aibenchmarks.dev/model?slug=gpt-5-6-luna · How the rankings work · Data refreshed daily, snapshot 2026-07-10.