GPT-5.5

OpenAI · Flagship Models

#352.5

GPT-5.5 is OpenAI's reasoning-capable model: $5/$30 per 1M input/output tokens, 1.1M token context window, 58.6% on SWE-Bench Pro. It supports native tool calling, extended reasoning, image/file input. Released 2026-04-23.

Verified · 2+ sourcesVerified Jun 10, 2026MultimodalLong Context

Input Price

$5

Output Price

$30

Cache Read Price

$0.5

Context Window

1.1M

All metrics

MetricValueProvenance receipt
Input Price$5
Output Price$30
Cache Read Price$0.5
Context Window1.1M
Max Output Tokens128K
SWE-Bench Pro Score58.6%
Tool CallingYes
Extended ReasoningYes

Pricing

Pay-as-you-go API

$5per 1M input tokens

Output
$30 / 1M tokens
Cache read
$0.5 / 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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