GPT-5.5 Instant — benchmark results
OpenAI's fast GPT-5.5 Instant tier for low-latency chat. Provider: OpenAI. Released 2026-04-23. Access: API.
Unified ELO 1761 ± 30, rank #178 of 1776 rated models, from 57 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA Omniscience - Software Engineering (SWE) - TypeScript | 80 | Accuracy (%) | 96.7 |
| AA Omniscience - Software Engineering (SWE) - Julia | 68 | Accuracy (%) | 96 |
| AA Omniscience - Software Engineering (SWE) - Kotlin | 68 | Accuracy (%) | 95.8 |
| UGI - Natural Intelligence | 62.57 | NatInt Score | 95.5 |
| AA Omniscience - Software Engineering (SWE) - C | 83 | Accuracy (%) | 95.1 |
| AA Omniscience - Software Engineering (SWE) - PHP | 76 | Accuracy (%) | 95 |
| AA Omniscience - Software Engineering (SWE) - Python | 75 | Accuracy (%) | 94.9 |
| Epoch AI - ECI | 158.52 | ECI Score | 94.9 |
| AA Terminal-Bench Hard | 49.24 | Accuracy (%) | 94.5 |
| AA Omniscience - Software Engineering (SWE) | 69.5 | Accuracy (%) | 94.4 |
| AA Omniscience - Software Engineering (SWE) - R | 60 | Accuracy (%) | 94.4 |
| AA Omniscience - Business | 38.8 | Accuracy (%) | 94.1 |
Interactive version: theaggregate.ai/model?slug=gpt-5-5-instant · How the rankings work · Data refreshed daily, snapshot 2026-07-22.