GPT-5.5 Pro

OpenAI · Flagship Models

#1031.9

GPT-5.5 Pro is OpenAI's reasoning-capable model: $30/$180 per 1M input/output tokens, 1.1M token context window. It supports native tool calling, extended reasoning, image/file input. Released 2026-04-23.

Verified · 2+ sourcesVerified Jun 10, 2026MultimodalLong Context

Input Price

$30

Output Price

$180

Context Window

1.1M

Max Output Tokens

128K

All metrics

MetricValueProvenance receipt
Input Price$30
Output Price$180
Context Window1.1M
Max Output Tokens128K
Tool CallingYes
Extended ReasoningYes

Pricing

Pay-as-you-go API

$30per 1M input tokens

Output
$180 / 1M tokens
Verified · 2+ sourcesChecked Jun 10, 2026
Official pricing →

Data sources

Facts on this page are sourced from the following verified sources.

All sources are verified before data goes live.

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