OpenAI · 2026-05-14 · major
OpenAI Codex Lands in ChatGPT Mobile — Drive Coding Sessions From iOS or Android With a Secure Relay to Your Mac, Free Tier Included
OpenAI extends Codex to the ChatGPT mobile app on iOS and Android. Users can view live sessions, approve commands, switch models, and start new tasks from a phone, with a secure relay reaching a paired Mac.
Codex now rides shotgun in the ChatGPT mobile app, so you can babysit long-running coding sessions from anywhere.
Key specs
| Platforms live | iOS, Android, macOS |
|---|---|
| Platforms soon | Windows |
| Availability | All tiers including Free and Go |
What is it?
Codex is OpenAI's agentic coding tool. The mobile rollout puts the same session controls that used to live in the CLI and Chrome extension into the ChatGPT app on iOS and Android. Coding still runs on a paired Mac (Windows is listed as coming soon), but the phone becomes the cockpit.
How does it work?
A secure relay layer brokers traffic between the ChatGPT app and the user's trusted machine without exposing that machine to the public internet. Session state and context stay synced across every device signed in to ChatGPT, so a task started on the desktop can be reviewed, approved, or branched from the phone. Mobile users can switch models, kick off new threads, and receive screenshots and test output as the agent runs.
Why does it matter?
Codex sessions can stretch over hours. Putting the controls on a phone closes a gap that Anthropic's Claude Code, Cursor's cloud agents, and Google's Jules have all been pushing into. Free tier inclusion makes it a default workflow rather than a Pro luxury, raising the floor of what mobile coding looks like for everyone.
Who is it for?
Developers running Codex sessions on a Mac and frequent context-switchers who want to triage runs away from a desktop.
Try it
Open the ChatGPT app on iOS or Android, tap the Codex tab, and pair it with your Mac running Codex.