OpenAI and Apple collaborated to integrate ChatGPT into Apple devices (iPhones, iPads, and Macs). This integration allows users to access ChatGPT through Siri, Apple's writing tools, and camera controls, enabling tasks like document creation, summarization, and visual object identification using ChatGPT. The integration is designed to be user-friendly, requiring no account for basic use, and offering optional account login for enhanced features. Users can easily access and continue ChatGPT conversations directly from the integrated tools. The video showcases the functionality across multiple Apple devices and applications.