Model dossier

OpenAI: GPT-5.5

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...

ProviderOpenAI Start comparison

Context1,050,000

Max output128,000

Pricing viewTVP price

Identity

OpenAI: GPT-5.5

Model ID: openai/gpt-5.5
Canonical slug: openai/gpt-5.5-20260423
Knowledge cutoff: 2025-12-01
Created: 4/24/2026

Capabilities

fileimagetexttoolsstructured

Modalities

text+image+file->textfileimagetext

Capacity

Context1,050,000

Max output128,000

TokenizerGPT