OpenAI Help Center, “Where Work and Codex are available”:
Work is available on ChatGPT web and mobile for eligible paid plans. Work is also available in the ChatGPT desktop app when included for your plan and workspace.
Work on web and mobile runs in the cloud. Work in the desktop app can also use local files and desktop apps with your permission. At launch, cloud Work conversations do not appear in desktop Work; desktop Work threads and local files remain on that computer.
Codex is available as a mode in the ChatGPT desktop app. It can work with local folders, repositories, terminals, and developer tools. Codex is not a selectable mode on web or mobile. You can access supported desktop Codex tasks from the Remote tab in the ChatGPT mobile app, but those tasks do not become web or mobile chat history.
These three paragraphs, from OpenAI’s own Help Center, sound more like a critic’s scathing review of what’s wrong with the new ChatGPT “super” app than a guide to how to use it.