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Want to experience the magic of large language models (LLMs) but struggling with insufficient local computer performance? Typically, we deploy models locally using tools like ollama, but limited by computer resources, we can often only run smaller models like 1.5b (1.5 billion), 7b (7 billion), and 14b (14 billion) parameters. Deploying a 70 billion parameter LLM is a huge challenge for local hardware.

Now, you can leverage Cloudflare's Workers AI to deploy large models like 70b online and access them from the internet. Its interface is OpenAI-compatible, meaning you can use it just like OpenAI's API. The only downside is the limited daily free tier; exceeding it will incur charges. If you're interested, give it a try!

Prerequisites: Log in to Cloudflare and Bind a Domain ​

If you don't have your own domain yet, Cloudflare provides a free account domain. However, please note that this free domain may not be directly accessible in some regions, and you may need to use some "magic" to access it.

First, open the Cloudflare website (https://dash.cloudflare.com) and log in to your account.

Step 1: Create Workers AI ​

  1. Find Workers AI: In the Cloudflare dashboard, find "AI" -> "Workers AI" in the left navigation bar, and then click "Create from Worker template".

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  2. Create Worker: Then click "Create Worker".

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  3. Enter Worker Name: Enter a string of English letters, which will serve as the default account domain for your Worker.

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  1. Deploy: Click the "Deploy" button in the lower right corner to complete the creation of the Worker.

Step 2: Modify Code and Deploy the Llama 3.3 70b Large Model ​

  1. Enter Code Editor: After deployment, you will see the interface shown below. Click "Edit code".

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  2. Clear Code: Delete all the preset code in the editor.

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  3. Paste Code: Copy and paste the following code into the code editor:

    Here we are using the llama-3.3-70b-instruct-fp8-fast model, which has 70 billion parameters.

    You can also find other models to replace it on the Cloudflare Models page, such as Deepseek open-source models. However, llama-3.3-70b-instruct-fp8-fast is currently one of the largest and most effective models available. image.png

    javascript
    const API_KEY='123456';
export default {
  async fetch(request, env) {

    let url = new URL(request.url);
    const path = url.pathname;

    const authHeader = request.headers.get("authorization") || request.headers.get("x-api-key");
    const apiKey = authHeader?.startsWith("Bearer ")  ? authHeader.slice(7)  : null;
                        
    if (API_KEY && apiKey !== API_KEY) {

      return new Response(JSON.stringify({
        error: {
            message: "Invalid API key. Use 'Authorization: Bearer your-api-key' header",
            type: "invalid_request_error",
            param: null,
            code: "invalid_api_key"
        }
      }), {
          status: 401,
          headers: {
              "Content-Type": "application/json",
          }
      });
    }

    if (path === "/v1/chat/completions") {
      const requestBody = await request.json();
       // messages - chat style input
	  const {message}=requestBody
	  let chat = {
		messages: message
	  };
      let response = await env.AI.run('@cf/meta/llama-3.3-70b-instruct-fp8-fast', requestBody);
    
      let resdata={
        choices:[{"message":{"content":response.response}}]
      }    
      return Response.json(resdata);
    }  
   
  }
};

  4. Deploy Code: After pasting the code, click the "Deploy" button.

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Step 3: Bind a Custom Domain ​

  1. Return to Settings: Click the back button on the left to return to the Worker management page, find "Settings" -> "Domains & Routes".

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  1. Add Custom Domain: Click "Add a custom domain", then select "Custom domain" and enter the subdomain you have already bound to Cloudflare.

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Step 4: Use in OpenAI-Compatible Tools ​

After adding a custom domain, you can use this large model in any OpenAI API-compatible tool.

  • API Key: Is the API_KEY you set in the code, which defaults to 123456.
  • API Address: https://your-custom-domain/v1

Thanks to Cloudflare's powerful GPU resources, it is very smooth to use.

Precautions ​

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