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

BenchmarkScoreMetricPercentile
AA Omniscience - Software Engineering (SWE) - TypeScript80Accuracy (%)96.7
AA Omniscience - Software Engineering (SWE) - Julia68Accuracy (%)96
AA Omniscience - Software Engineering (SWE) - Kotlin68Accuracy (%)95.8
UGI - Natural Intelligence62.57NatInt Score95.5
AA Omniscience - Software Engineering (SWE) - C83Accuracy (%)95.1
AA Omniscience - Software Engineering (SWE) - PHP76Accuracy (%)95
AA Omniscience - Software Engineering (SWE) - Python75Accuracy (%)94.9
Epoch AI - ECI158.52ECI Score94.9
AA Terminal-Bench Hard49.24Accuracy (%)94.5
AA Omniscience - Software Engineering (SWE)69.5Accuracy (%)94.4
AA Omniscience - Software Engineering (SWE) - R60Accuracy (%)94.4
AA Omniscience - Business38.8Accuracy (%)94.1

Interactive version: theaggregate.ai/model?slug=gpt-5-5-instant · How the rankings work · Data refreshed daily, snapshot 2026-07-22.