By using OpenAI's GPT-3 model, a Flask app can be created to generate Yugioh deck lists based on user input. The app uses Twilio for SMS functionality and Redis Queue to handle tasks asynchronously. Once the task is finished, it sends a text message with the generated deck list. The app also includes a route for receiving POST requests from Twilio whenever a text message is sent to the phone number, allowing users to generate new deck lists by texting the phone number.