OpenAI has expanded its Codex coding app to mobile platforms, enabling all ChatGPT users on Android and iOS to manage their coding projects remotely. This integration allows users to interact with Codex while ensuring that their files, credentials, and permissions remain secure on the original device, such as a Mac mini. The ChatGPT app serves as an intermediary, providing updates and allowing users to prompt Codex without directly programming on their phones. OpenAI emphasizes that a secure relay layer maintains the connection between devices without exposing them to the public internet. This launch not only enhances accessibility but also aligns with OpenAI's vision of creating a comprehensive super app that combines ChatGPT, Codex, and its Atlas web browser into one seamless experience. Users can start using the new mobile integration by updating their ChatGPT app and Codex app on Mac, with Windows support expected soon.