Integrating Custom GPTs into WhatsApp

Integrating artificial intelligence into messaging platforms like WhatsApp can transform the way businesses and individuals communicate.

A YouTube tutorial below by Liam Ottley (crazy smart dude) demonstrates a streamlined approach to incorporating custom Generative Pre-trained Transformers (GPTs) into WhatsApp, utilizing a combination of Assistants API, Replit, ManyChat, and WhatsApp.

This article provides an overview of this method, offering a more accessible route for those looking to enhance their WhatsApp experience with the power of AI.

Step 1: Setting Up with Assistants API

Assistants API is a crucial component in this integration, serving as the bridge between the custom GPT model and WhatsApp.

  1. Create an Account: Sign up for Assistants API, which will provide the necessary tools to create and manage your custom GPT.
  2. Configure Your GPT Model: Use Assistants API to configure your GPT model according to your requirements, whether for customer service, personal assistance, or other purposes.

Step 2: Coding on Replit

Replit, an online coding platform, offers an environment to write and run the code necessary for integration.

  1. Develop the Integration Code: Write the code in Replit that connects your GPT model from Assistants API to ManyChat. This code will handle the processing and routing of messages.
  2. Test Your Code: Utilize Replit’s tools to test and debug your code, ensuring that it interacts correctly with Assistants API and ManyChat.

Step 3: Connecting with ManyChat

ManyChat acts as the intermediary between WhatsApp and your GPT model, handling the conversational aspects of the integration.

  1. Set Up a ManyChat Account: Register and configure a ManyChat account. Link it to your WhatsApp Business account to enable communication through WhatsApp.
  2. Integrate with Replit: Connect ManyChat with your Replit code. This allows messages from WhatsApp to be sent to your custom GPT model and vice versa.

Step 4: Bringing It All Together on WhatsApp

With all the components in place, the final step is to bring the integration to life on WhatsApp.

  1. Test the Integration: Conduct thorough testing on WhatsApp to ensure that messages are correctly processed by your custom GPT and that the responses are appropriate and timely.
  2. Launch and Monitor: Once satisfied with the testing, launch the integration. Continuously monitor the conversations to ensure the GPT is responding as expected and to gather feedback for further improvements.


This method of integrating custom GPTs into WhatsApp using Assistants API, Replit, and ManyChat provides a streamlined and accessible way to enhance WhatsApp with AI capabilities. By following these steps, businesses and individuals can leverage the power of GPTs to improve engagement, automate responses, and offer a more dynamic and interactive messaging experience on one of the world’s most popular communication platforms.