gpt-5.2

Name: gpt-5.2
Author: Vercel AI Gateway

proprietary

GPT-5.2 is our previous flagship model for complex professional work. We recommend using the latest GPT-6 Astra. Learn more on the Model guidance page. Reasoning.effort supports: none (default), low, medium, high and xhigh.

Intelligence

Reasoning

Speed

Context

400K

Max output

128K

Input price

$1.75/1M tokens

Output price

$14/1M 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-5.2

Licenseproprietary

Statusactive

Typechat

Input modalitiestext

Output modalitiestext

Open weightNo

Parameters—

Architecture—

Context window400K tokens

Max input—

Max output128K tokens

Reasoning tokensYes

Knowledge cutoff2025-08

Release date2025-12-11

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$1.75

Output

$14

Cache write

—

Cache read

—

Batch in

—

Batch out

—

Family Comparison: gpt-5.2

Model	Caps	Perf	Speed	Context	Max out	Pricing
gpt-5.2-chat	RTS	—	—	128K	—	$1.75$14
gpt-5.2-codex	RTJJMS	—	—	400K	128K	$1.75$14
gpt-5.2	RTJJMSB	—	—	400K	128K	$1.75$14
gpt-5.2-pro	RTS	—	—	400K	128K	$21$168

API

GET/v1/models/vercel/openai/gpt-5.2