GPT-5.3 Instant: benchmark results

Provider: OpenAI. Released 2026-03-03. Access: API.

Unified ELO 1819 ± 44, rank #130 of 2656 rated models, from 22 benchmark results.

Strongest benchmark results

BenchmarkScoreMetricPercentile
OpenAI GPT-5.6 August Update System Card - Adversarial User Simulations - Emotional Reliance98.7not_unsafe message rate (%)100
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Extremism94.3not_unsafe rate (%)100
OpenAI GPT-5.6 August Update System Card - Image Input - Erotic99.8not_unsafe rate (%)100
OpenAI GPT-5.6 August Update System Card - Image Input - Extremism98.9not_unsafe rate (%)100
OpenAI GPT-5.6 August Update System Card - Image Input - Hate99.8not_unsafe rate (%)100
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Hate100not_unsafe rate (%)83.3
OpenAI GPT-5.6 August Update System Card - Adversarial User Simulations - Mental Health98.4not_unsafe message rate (%)66.7
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Gore81.2not_unsafe rate (%)66.7
BenchLM57Overall Score62.4
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Self-Harm84.6not_unsafe rate (%)33.3
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Sexual88.8not_unsafe rate (%)33.3
OpenAI GPT-5.6 August Update System Card - Challenging Prompts - Sexual/Minors87.2not_unsafe rate (%)33.3

Interactive version: theaggregate.ai/model?slug=gpt-5-3-instant · How It Works · Data refreshed daily, snapshot 2026-09-19.