Summary
OpenAI is rolling out a preview of Codex in the ChatGPT mobile app on iOS and Android. Users can connect to active Codex sessions running on laptops, devboxes, or managed remote environments, review outputs, approve commands, and steer work without moving files, credentials, or local setup off the host machine.
What changed
Codex is now available in preview inside the ChatGPT mobile app, with cross-device access to active threads, approvals, terminal output, diffs, screenshots, and remote environments.
Why it matters
This pushes coding agents from desktop-bound tools toward persistent workflows that can be supervised from anywhere. It raises the bar for long-running agent UX and puts competitive pressure on Cursor, Windsurf, and similar tools to support mobile oversight of remote development work.
Evidence excerpt
OpenAI says Codex is now in preview in the ChatGPT mobile app and can connect to machines where Codex is already running, with live session state, approvals, screenshots, terminal output, diffs, and test results available from the phone.