Using GPT Realtime 2.1 on Vercel AI Gateway

Implementation guide · GPT Realtime 2 · OpenAI

Serverless

Vercel AI Gateway exposes GPT Realtime 2.1 through model ID openai/gpt-realtime-2.1. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-10-19. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at Vercel AI Gateway and generate an API key.
  2. 2
    Use the Vercel AI Gateway SDK or REST API to call openai/gpt-realtime-2.1 — see the documentation for request format.
  3. 3
    You'll be billed $4.00/1M input, $24.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

Install
pip install openai
API key
AI_GATEWAY_API_KEY
Model ID
openai/gpt-realtime-2.1

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-realtime-2.1",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on Vercel AI Gateway

TypePrice (per 1M)
Input tokens$4.00
Output tokens$24.00

Capabilities

VisionMultimodalReasoningAudio

About GPT Realtime 2.1

OpenAI Realtime API flagship speech-to-speech model (gpt-realtime-2.1) with text/audio/image input, text/audio output, 128K context, reasoning token support.

Full model details →

Model Specs

Released2026-07-06
Context128K
Knowledge cutoff2024-09

Also available on(2)

OpenAI API$4.00/1MMicrosoft Foundry$4.00/1M
Compare all providers →

Provider

Vercel AI Gateway

Vercel