AI

Cloudflare Workers AI

threepointone/workers-ai-provider is a community provider that allows you to use Cloudflare's Workers AI models with the AI SDK.

Setup

The Cloudflare Workers AI provider is available in the workers-ai-provider module. You can install it with:

pnpm
npm
yarn
pnpm add workers-ai-provider

Then, setup an AI binding in your Cloudflare Workers project wrangler.toml file:

wrangler.toml
[ai]
binding = "AI"

Provider Instance

To create a workersai provider instance, use the createWorkersAI function, passing in the AI binding as an option:

import { createWorkersAI } from 'workers-ai-provider';


const workersai = createWorkersAI({ binding: env.AI });

Language Models

To create a model instance, call the provider instance and specify the model you would like to use as the first argument. You can also pass additional settings in the second argument:

import { createWorkersAI } from 'workers-ai-provider';


const workersai = createWorkersAI({ binding: env.AI });
const model = workersai('@cf/meta/llama-3.1-8b-instruct', {
  // additional settings
  safePrompt: true,
});

You can use the following optional settings to customize:

  • safePrompt boolean

    Whether to inject a safety prompt before all conversations. Defaults to false

Examples

You can use Cloudflare Workers AI language models to generate text with the generateText or streamText function:

generateText 

import { createWorkersAI } from 'workers-ai-provider';
import { generateText } from 'ai';


type Env = {
  AI: Ai;
};


export default {
  async fetch(_: Request, env: Env) {
    const workersai = createWorkersAI({ binding: env.AI });
    const result = await generateText({
      model: workersai('@cf/meta/llama-2-7b-chat-int8'),
      prompt: 'Write a 50-word essay about hello world.',
    });


    return new Response(result.text);
  },
};

streamText 

import { createWorkersAI } from 'workers-ai-provider';
import { streamText } from 'ai';


type Env = {
  AI: Ai;
};


export default {
  async fetch(_: Request, env: Env) {
    const workersai = createWorkersAI({ binding: env.AI });
    const result = streamText({
      model: workersai('@cf/meta/llama-2-7b-chat-int8'),
      prompt: 'Write a 50-word essay about hello world.',
    });


    return result.toTextStreamResponse({
      headers: {
        // add these headers to ensure that the
        // response is chunked and streamed
        'Content-Type': 'text/x-unknown',
        'content-encoding': 'identity',
        'transfer-encoding': 'chunked',
      },
    });
  },
};

generateObject

Some Cloudflare Workers AI language models can also be used with the generateObject function:

import { createWorkersAI } from 'workers-ai-provider';
import { generateObject } from 'ai';
import { z } from 'zod';


type Env = {
  AI: Ai;
};


export default {
  async fetch(_: Request, env: Env) {
    const workersai = createWorkersAI({ binding: env.AI });
    const result = await generateObject({
      model: workersai('@cf/meta/llama-3.1-8b-instruct'),
      prompt: 'Generate a Lasagna recipe',
      schema: z.object({
        recipe: z.object({
          ingredients: z.array(z.string()),
          description: z.string(),
        }),
      }),
    });


    return Response.json(result.object);
  },
};
tools and streamObject are currently not supported.