GPT-5.6 Terra (xHigh): benchmark results
GPT-5.6 Terra evaluated at the xhigh reasoning-effort setting. Provider: OpenAI. Released 2026-07-09. Access: API.
Unified ELO 1706 ± 1, rank #89 of 1761 rated models, from 92 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA Terminal-Bench Hard | 62.88 | Accuracy (%) | 99.5 |
| LLM Chess (Saplin) | 1293 | ELO | 96.3 |
| AA CritPt | 27.14 | Accuracy (%) | 96.2 |
| Vals AI TaxEval v2 | 76.17 | Accuracy (%) | 96.2 |
| Chatbot Arena (Text - French) | 1506 | Arena Score | 95.3 |
| Chatbot Arena (Text - German) | 1488 | Arena Score | 94.6 |
| Chatbot Arena (Text - Math) | 1482 | Arena Score | 94.2 |
| ProofBench | 71 | Score (self-reported) | 93.9 |
| Artificial Analysis Intelligence Index | 44.39 | Intelligence Index | 93.6 |
| Chatbot Arena (Text - Japanese) | 1474 | Arena Score | 93.5 |
| Chatbot Arena (Text - Chinese) | 1519 | Arena Score | 92.7 |
| AA Omniscience - Software Engineering (SWE) | 71.5 | Accuracy (%) | 92.6 |
Interactive version: theaggregate.ai/model?slug=gpt-5-6-terra-xhigh · How It Works · Data refreshed daily, snapshot 2026-09-05.