GPT-5.5 Instant

GPT-5.5 Instant

Developer	OpenAI
Release date	May 5, 2026
Family	GPT
Generation	GPT-5.5
Level
Context window	400K tokens
Max output	128K tokens
Input	Text, image, file
Output	Text
Knowledge cutoff	2025-12-01
Weights	Closed
Website	openai.com

Part of a series on

Context: 400Ktokens
Released: 6mo ago

Specifications

Model

Developer: OpenAI
Family: GPT GPT-5.5
Type: Language model
Released: May 5, 2026
Model ID: openai/gpt-5.5-instant

Capabilities

Input → output: Text, image, file → Text
Max output: 128K tokens
Knowledge cutoff: 2025-12-01

Weights

Openness: Closed

Sources:models.dev

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

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