OpenAI Brings Codex to iPhone and Android as Agentic Coding Goes Everywhere

OpenAI on Thursday shipped Codex integration directly into the ChatGPT app for iOS and Android, giving developers a mobile window into their running Codex environments for the first time. The update is rolling out now as a preview and is available to all plans.

Image by OpenAI

OpenAI Brings Codex to iPhone and Android as Agentic Coding Goes Everywhere

The integration lives inside the ChatGPT app rather than the standalone Codex for Mac app. Once a developer connects their phone to any machine running Codex — whether a laptop, a dedicated Mac mini, or a managed remote environment — the app loads the live state of that session and keeps it in sync.

"Codex is now in the ChatGPT mobile app so you can stay in the loop from anywhere while Codex gets work done across your laptops, devboxes, or remote environments," OpenAI announced Thursday. The update is available to all ChatGPT subscribers on both iOS and Android. Windows support is listed as coming soon.

What the Mobile Integration Actually Does

OpenAI is careful to frame this as more than a remote viewing pane. From the phone, developers can work across all open threads, review Codex outputs, approve terminal commands, change the underlying model, and kick off new tasks. Files, credentials, permissions, and the local environment stay on the host machine. What flows back to the phone in real time includes screenshots, terminal output, diffs, test results, and approval prompts.

"This is more than the ability to remotely control a single task or dispatch new tasks to your computer," OpenAI said in its announcement. "From your phone, you can work across all of your threads, review outputs, approve commands, change models, or start something new."

The practical target is the growing gap between where agents run and where developers are. As Codex sessions grow longer and more autonomous, being able to check in, unblock an approval, or redirect a task from a phone without sitting at a desk changes how teams can structure asynchronous agentic work.

A Year of Rapid Codex Expansion

This is the latest in a string of Codex capability additions over the past few months. In April, OpenAI gave the desktop app the ability to run in the background and operate Mac applications with its own cursor, allowing parallel computer use alongside an active user session. Earlier this month, OpenAI shipped a Chrome extension that lets Codex work across browser tabs in live sessions without taking over the browser.

The mobile push also reflects Codex's broader growth. According to OpenAI, Codex now has more than 4 million weekly active users — an 8x increase since the beginning of the year.

Anthropic shipped a similar feature — Remote Control for Claude Code — in February, letting developers monitor Claude Code sessions from a mobile device. The parallel rollouts from both companies point to a shared conclusion: as coding agents take on longer-horizon work, mobile access to those sessions is becoming a first-class developer workflow.

What Is Not Yet Available

The mobile integration is currently Mac-only on the host side. OpenAI says support for connecting a phone to Codex running on Windows is coming soon. The update requires the latest version of both Codex for Mac and ChatGPT for iOS or Android.