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GPT-5.5 Pro

Name: GPT-5.5 Pro
Author: OpenAI

by OpenAI

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K

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Models

GPT-5.5 Pro

Added 10 July 2026

#openai

Overview

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

How to use / API access

Call via OpenRouter with model id `openai/gpt-5.5-pro`.

openrouter · openai/gpt-5.5-pro Docs

OpenRouter id: openai/gpt-5.5-pro

Notes

GPT-5.5 Pro is listed in the EDNA Models directory from the OpenRouter catalogue.

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