ChatGPT adds Codex mobile preview for diffs, approvals, and long-running agent work

• OpenAI pushed a Codex mobile preview inside the ChatGPT app, and steipete reposting OpenAI's preview says the phone flow covers new work, output review, execution steering, and approvals.
• minchoi's demo summary shows the core mobile controls in one loop: review outputs, approve commands, inspect diffs, and keep long-running coding jobs moving away from the desktop.
• The mobile setup still depends on a host computer connection, and petergyang's setup screenshot shows toggles for keeping a Mac awake, enabling computer use, and adding a Chrome extension.
• LLMJunky's QR setup screenshot suggests the onboarding path runs through a QR handshake from desktop to phone, with the ChatGPT app authorizing access to Codex on the computer.
• Early reaction was mixed on the interface, because thekitze on Codex as a harness praised Codex as a harness while complaining that managing life through a scrolling sidebar was not the experience he wanted.

You can see the mobile review loop in minchoi's recorded demo, the desktop-to-phone authorization flow in LLMJunky's setup screenshot, and the machine-side requirements in petergyang's connection screen. The sharpest caveat came from thekitze's reply, which liked Codex as the underlying harness but not the app shell around it.

The preview moves the familiar coding-agent checkpoints onto a phone. According to minchoi's demo summary, the app can review outputs, approve commands, inspect diffs, and keep long-running work going while you are away from the main machine.

OpenAI's own launch copy, preserved in steipete reposting OpenAI's preview, frames the same flow a little more broadly: start new work, review outputs, and steer execution from the ChatGPT mobile app.

The mobile preview is not a fully self-contained coding app. LLMJunky's QR setup screenshot shows a desktop setup page with a QR code, then a phone prompt asking whether the device should access Codex on the computer.

The host machine also appears to need extra permissions. In petergyang's setup screenshot, the connection screen enables three toggles: keep this Mac awake, enable computer use, and set up a Chrome extension for navigating and filling forms on websites.

The first negative note in the evidence is about interface shape, not agent quality. thekitze on Codex as a harness said Codex was "great tho as a harness" but added that scrolling a sidebar up and down was not how he wanted to manage his life.

That complaint landed next to thekitze's app reaction, a blunt "i am done with the codex app," which makes the split pretty clear: mobile access looks useful, but the app wrapper still has room to grow.