gpt-5.5

Name: gpt-5.5
Author: Vercel AI Gateway

proprietary

GPT-5.5 is a flagship model for the most complex professional work. Learn more in our GPT-5.5 model guidance. Reasoning.effort supports: none, low, medium (default), high and xhigh.

Intelligence

Reasoning

Speed

Context

Max output

128K

Input price

$5/1M tokens

Output price

$30/1M tokens

Capabilities

Show unsupported (2)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Batch Processing

Details

ProviderVercel AI Gateway

CreatorOpenAI

Familygpt-5.5

Licenseproprietary

Statusactive

Typechat

Input modalitiestext

Output modalitiestext

Open weightNo

Parameters—

Architecture—

Context window1M tokens

Max input—

Max output128K tokens

Reasoning tokensYes

Knowledge cutoff2025-12

Release date2026-04-23

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

Output

$30

Cache write

—

Cache read

—

Batch in

—

Batch out

—

Family Comparison: gpt-5.5

Model	Caps	Perf	Speed	Context	Max out	Pricing
gpt-5.5	RTJJMSB	—	—	1M	128K	$5$30
gpt-5.5-pro	RTJJMSB	—	—	1M	128K	$30$180

API

GET/v1/models/vercel/openai/gpt-5.5