GPT-5.5 (Low) — benchmark results
GPT-5.5 evaluated at the low reasoning-effort setting. Provider: OpenAI. Released 2026-04-23. Access: API.
Unified ELO 1904 ± 23, rank #62 of 1776 rated models, from 50 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA Omniscience - Software Engineering (SWE) - Dart | 78 | Accuracy (%) | 99.6 |
| AA Omniscience - Software Engineering (SWE) - Swift | 88 | Accuracy (%) | 99.3 |
| AA Omniscience - Software Engineering (SWE) - PHP | 92 | Accuracy (%) | 99.1 |
| AA Omniscience - Software Engineering (SWE) - Python | 88 | Accuracy (%) | 98.9 |
| UGI - Natural Intelligence | 71.39 | NatInt Score | 98.7 |
| AA Omniscience - Software Engineering (SWE) - HTML | 86 | Accuracy (%) | 98.5 |
| AA Omniscience - Software Engineering (SWE) - Julia | 76 | Accuracy (%) | 98.3 |
| AA Omniscience - Software Engineering (SWE) - TypeScript | 88.89 | Accuracy (%) | 98.3 |
| AA Omniscience - Software Engineering (SWE) | 82.2 | Accuracy (%) | 98 |
| AA Omniscience - Software Engineering (SWE) - C | 87 | Accuracy (%) | 98 |
| AA Omniscience - Software Engineering (SWE) - Java | 66 | Accuracy (%) | 98 |
| AA Omniscience - Software Engineering (SWE) - Kotlin | 78 | Accuracy (%) | 97.7 |
Interactive version: theaggregate.ai/model?slug=gpt-5-5-low · How the rankings work · Data refreshed daily, snapshot 2026-07-22.