---
title: OpenAI
description: Route OpenAI API requests through AI Gateway for observability and control.
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/ai-gateway/llms.txt  
> Use this file to discover all available pages before exploring further. 

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# OpenAI

[OpenAI ↗](https://openai.com/about/) 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

With Key in Request

* [ With Authenticated Gateway ](#tab-panel-6880)
* [ Unauthenticated Gateway ](#tab-panel-6881)

```
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!" }],});
```

With Stored Keys (BYOK) / Unified Billing

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

### cURL

Responses API with API Key in Request

* [ With Authenticated Gateway ](#tab-panel-6882)
* [ Unauthenticated Gateway ](#tab-panel-6883)

Terminal window

```
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."      }    ]  }'
```

Terminal window

```
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."      }    ]  }'
```

Chat Completions with API Key in Request

* [ With Authenticated Gateway ](#tab-panel-6884)
* [ Unauthenticated Gateway ](#tab-panel-6885)

Terminal window

```
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?"      }    ]  }'
```

Terminal window

```
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?"      }    ]  }'
```

Responses API with Stored Keys (BYOK) / Unified Billing

Terminal window

```
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."      }    ]  }'
```

Chat Completions with Stored Keys (BYOK) / Unified Billing

Terminal window

```
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?"      }    ]  }'
```

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```