GPT-5.5 Pro

GPT-5.5 Pro

Developer	OpenAI
Release date	April 23, 2026
Family	GPT
Generation	GPT-5.5
Level
Context window	1.1M tokens
Max output	128K tokens
Input	File, image, text
Output	Text
Knowledge cutoff	2025-12-01
Weights	Closed
Predecessor	GPT-5.4 Pro
Website	openai.com
Links	Docs

Part of a series on

input: $30.00
output: $180.00
Context: 1.1Mtokens
Released: 6mo ago

Specifications

Model

Developer: OpenAI
Family: GPT GPT-5.5
Type: Language model
Released: April 23, 2026
Model ID: openai/gpt-5.5-pro

Capabilities

Input → output: File, image, text → Text
Max output: 128K tokens
Tokenizer: GPT
Knowledge cutoff: 2025-12-01

Weights

Openness: Closed

Sources:models.devOpenRouter

Metadata synced Nov 3, 2026, 11:17 PM UTC

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