Unified API (OpenAI compat)

Cloudflare's AI Gateway offers an OpenAI-compatible /chat/completions endpoint, enabling integration with multiple AI providers using a single URL. This feature simplifies the integration process, allowing for seamless switching between different models without significant code modifications.

Endpoint URL

https://gateway.ai.cloudflare.com/v1/{account_id}/default/compat/chat/completions

Replace {account_id} with your Cloudflare account ID. The default gateway is created automatically on your first request — no setup needed. You can also replace default with a specific gateway ID if you have already created one.

Parameters

Switch providers by changing the model and apiKey parameters.

Specify the model using {provider}/{model} format. For example:

• openai/gpt-5-mini
• google-ai-studio/gemini-2.5-flash
• anthropic/claude-sonnet-4-5

Examples

Make a request to

OpenAI

using

OpenAI JS SDK

with

Stored Key (BYOK)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: