Using GPT-5 Chat on Vercel AI Gateway

Implementation guide · GPT-5 · OpenAI

Serverless

Vercel AI Gateway exposes GPT-5 Chat through model ID openai/gpt-5-chat. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-29. Next refresh: weekly.

Quick Start

1
Create an account at Vercel AI Gateway and generate an API key.
2
Use the Vercel AI Gateway SDK or REST API to call openai/gpt-5-chat — see the documentation for request format.
3
You'll be billed $1.25/1M input, $10.00/1M output tokens. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

Install

pip install openai

API key

AI_GATEWAY_API_KEY

Model ID

openai/gpt-5-chat

creator/model-name e.g. kwaipilot/kat-coder-pro-v2

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["AI_GATEWAY_API_KEY"],
    base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
    model="openai/gpt-5-chat",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on Vercel AI Gateway

Type	Price (per 1M)
Input tokens	$1.25
Output tokens	$10.00
Query	$10.00

Capabilities

VisionMultimodalJSON / Tool useStructured Outputs

About GPT-5 Chat

GPT-5 Chat is OpenAI's conversational variant of GPT-5 designed for advanced multimodal, context-aware enterprise conversations at 128K context.

Full model details →

Model Specs

Released2025-10-01

Context128k

ArchitectureDecoder Only

Knowledge cutoff2024-09

Vercel