OpenAI

Last updated Apr 20, 2026 helps you build with GPT models.

Endpoint

Base URL

https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai

When making requests to OpenAI, replace https://api.openai.com/v1 in the URL you are currently using with https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai.

Chat completions endpoint

https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/chat/completions

Responses endpoint

https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/responses

Examples

OpenAI SDK

<details>

<summary>

With Key in Request

</summary>

import OpenAI from "openai";

const client = new OpenAI({
    apiKey: "YOUR_OPENAI_API_KEY",
    defaultHeaders: {
        "cf-aig-authorization": `Bearer {cf_api_token}`,
    },
    baseURL:
        "https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai",
});

const response = await client.chat.completions.create({
    model: "gpt-4o-mini",
    messages: [{ role: "user", content: "Hello, world!" }],
});

import OpenAI from "openai";

const client = new OpenAI({
    apiKey: "YOUR_OPENAI_API_KEY",
    baseURL:
        "https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai",
});

const response = await client.chat.completions.create({
    model: "gpt-4o-mini",
    messages: [{ role: "user", content: "Hello, world!" }],
});

</details>

<details>

<summary>

With Stored Keys (BYOK) / Unified Billing

</summary>

import OpenAI from "openai";

const client = new OpenAI({
    apiKey: "{cf_api_token}",
    baseURL:
        "https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai",
});

// Ensure your OpenAI API key is stored with BYOK
// or Unified Billing has credits
const response = await client.chat.completions.create({
    model: "gpt-4o-mini",
    messages: [{ role: "user", content: "Hello, world!" }],
});

</details>

cURL

<details>

<summary>

Responses API with API Key in Request

</summary>

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/responses \
  --header 'Authorization: Bearer {OPENAI_API_KEY}' \
  --header 'cf-aig-authorization: Bearer {CF_AIG_TOKEN}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-5.1",
    "input": [
        {
        "role": "user",
        "content": "Write a one-sentence bedtime story about a unicorn."
        }
    ]
  }'

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/responses \
  --header 'Authorization: Bearer {OPENAI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-5.1",
    "input": [
        {
        "role": "user",
        "content": "Write a one-sentence bedtime story about a unicorn."
        }
    ]
  }'

</details>

<details>

<summary>

Chat Completions with API Key in Request

</summary>

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/chat/completions \
  --header 'Authorization: Bearer {OPENAI_API_KEY}' \
  --header 'cf-aig-authorization: Bearer {CF_AIG_TOKEN}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-4o-mini",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ]
  }'

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/chat/completions \
  --header 'Authorization: Bearer {OPENAI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-4o-mini",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ]
  }'

</details>

<details>

<summary>

Responses API with Stored Keys (BYOK) / Unified Billing

</summary>

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/responses \
  --header 'cf-aig-authorization: Bearer {CF_AIG_TOKEN}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-5.1",
    "input": [
        {
        "role": "user",
        "content": "Write a one-sentence bedtime story about a unicorn."
        }
    ]
  }'

</details>

<details>

<summary>

Chat Completions with Stored Keys (BYOK) / Unified Billing

</summary>

curl -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/chat/completions \
  --header 'cf-aig-authorization: Bearer {CF_AIG_TOKEN}' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-4o-mini",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ]
  }'

</details>

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