OpenAI Launches Codex in ChatGPT Mobile for Its 4M Weekly Users

Codex can now follow developers through meetings, commutes, and coffee breaks.

OpenAI is bringing its coding agent to the ChatGPT mobile app, giving users a way to keep tabs on its coding agent from their phones while work continues on their laptop, devbox, or remote environment. The preview launch comes as OpenAI says more than 4 million people now use Codex every week.

The update turns mobile access into a way to manage Codex work in the moments between full desktop use.

More than a remote control

Inside the ChatGPT mobile app, Codex opens into the live state of work already running elsewhere. Users are not limited to launching a task and waiting for the result.

The app lets users:

• review the agent’s output
• approve commands
• redirect active work
• switch models
• start a new thread
• follow progress through screenshots, terminal output, diffs, test results, and approval requests

Files, credentials, permissions, and local tools stay on the machine doing the work. Codex keeps running from the connected environment while the phone acts as a companion layer for the session.

Codex still needs a human in the loop

OpenAI’s examples focus on scenarios in which its coding agent needs a decision before continuing. A longer task may start at a desk and reach a fork before the user returns.

One example is a refactor started before a commute. Codex may find two possible approaches midway through the task and ask the user to choose a direction. The user can review the trade-offs and pick a path before the work stalls.

Bug investigations are another use case. For bugs, the agent can inspect relevant files and try to reproduce the issue in a browser. It can also run tests and begin working toward a fix, with the user stepping in when clarification or permission is needed.

A wider rollout for teams

Codex in the ChatGPT mobile app is rolling out in preview on iOS and Android across all plans, including Free and Go. Users need to update the app and the Codex app on macOS to try it, while support for connecting a phone to the Codex app on Windows is coming later.

For teams, the main mobile tie-in is access across approved devices and environments. Once Codex is connected to a remote or local machine, authorized ChatGPT devices can reach the active session through OpenAI’s secure relay layer.

Remote SSH is now generally available, giving teams another way to connect the coding agent to managed environments accessible from authorized ChatGPT devices.

OpenAI is launching a $4 billion-backed consulting arm to help businesses rebuild workflows around AI.