Using OpenAI Realtime API to build a Twilio Voice AI assistant with Node.js

NOTE: OpenAI Realtime API is now GA. We created an update video here:    • How to use OpenAI Realtime API with Twilio...  

We're so excited for our friends at OpenAI, who launched their Realtime API today. This tutorial is built using this exciting API. The API opens up Speech to Speech (S2S) capabilities for their GPT-4o multimodal model, which supports direct audio input and output – avoiding translating back and forth from text with a speech-to-text (SST) or text-to-speech (TTS) step.

Chapters:
00:00 Intro
00:42 Prerequisites
01:52 Code starts here
03:01 Configuring the application
03:53 Handling the incoming call
04:38 Setting up our OpenAI WebSocket
06:35 Handling Twilio Media Stream events
07:43 Starting the application
08:13 Tunneling with ngrok
08:41 Configuring our Twilio phone number
09:18 Testing the application

This video will help you build an AI assistant using Twilio Voice and OpenAI's Realtime API. Here's what you'll need to build it:
A Twilio account - you can get one at https://twilio.com/try-twilio?utm_sou...
A Twilio phone number - learn more about phone numbers here: https://www.twilio.com/docs/phone-num...
An OpenAI API Key with Realtime API access (https://platform.openai.com/docs/over...)

Blog post: https://www.twilio.com/en-us/blog/voi...

Github repo: https://github.com/twilio-samples/spe...

Resources:
Twilio Media Streams: https://www.twilio.com/docs/voice/med...
OpenAI GPT-4o: https://openai.com/index/hello-gpt-4o/
Ngrok: https://ngrok.com
CodeExchange example: https://www.twilio.com/code-exchange/...

#twilio #openai #voice #voiceai #voiceassistant #software #development