Building a Voice AI Bot with ChatGPT and Twilio

In today's digital age, customers demand personalized and seamless experiences across all channels. With the rise of voice assistants such as Alexa and Google Assistant, it's no surprise that voice-enabled customer service is becoming increasingly popular. Building a voice AI bot can be a game-changer for your business, and it's easier than you might think.

I've created a voice AI chatbot using OpenAI's ChatGPT model and Twilio, and it's now live and available for testing. Simply dial +44 7360 267733 to give it a try and experience the power of conversational AI firsthand.

In this blog post, I'll show you how to build a voice AI bot using ChatGPT and Twilio.

What is ChatGPT?

ChatGPT is a large language model developed by OpenAI that can be used for a wide range of natural language processing tasks, including conversational AI. With ChatGPT, you can create a chatbot that can converse with users in a natural and human-like way. You can read about ChatGPT here -

What is Twilio?

Twilio is a cloud communications platform that provides a wide range of tools and services for building voice, messaging, and video applications. With Twilio, you can easily integrate voice and messaging capabilities into your application, allowing you to communicate with your customers in real-time.

Building a Voice AI Bot with ChatGPT and Twilio

To build a voice AI bot, you will need to follow these steps:

Step 1: Set up a Twilio account

The first step is to sign up for a Twilio account. Once you've signed up, you'll need to set up a phone number that your bot will use to receive and make calls.

Step 2: Train your ChatGPT model

Next, you'll need to train your ChatGPT model to understand the types of questions and conversations your bot will handle. You can do this by providing the model with sample conversation data, which will help it learn how to respond to different types of questions.

Step 3: Set up a webhook

A webhook is a URL that Twilio can use to communicate with your bot. You'll need to set up a webhook that your bot can use to receive incoming calls and messages from Twilio.

Step 4: Build your bot

Once you've set up your Twilio account, trained your ChatGPT model, and set up a webhook, it's time to start building your bot. You can use Twilio's Programmable Voice API to create a voice application that can handle incoming calls and respond to user queries.

Here, I used Twilio's built-in speech recognition engine to convert speech to text and used serverless function to make an API call to OpenAI ChatGPT service.

Step 5: Test and refine your bot

After building your bot, it's important to test it thoroughly to ensure that it's working as intended. You can use Twilio's debugging tools to test your bot and make any necessary refinements.


Building a voice AI bot using ChatGPT and Twilio is an excellent way to provide your customers with a seamless and personalized experience. With these tools, you can create a chatbot that can handle complex conversations and provide accurate answers to user queries. By following these steps, you can quickly and easily build a voice AI bot that can help take your customer service to the next level.