Codex Comes to Mobile: AI Coding Agent Now Available on iOS & Android

Codex Arrives on Mobile: Control Your AI Coding Agent From Anywhere

OpenAI launched a preview of Codex inside the ChatGPT mobile app on May 14, 2026, extending the AI coding agent to iOS and Android devices. Available across all ChatGPT plans — including Free and Go — the mobile experience lets developers stay connected to long-running coding sessions without being tied to their desks.

How Mobile Control Works

The mobile integration is not a standalone coding environment but a remote control interface for a connected Codex host. When a developer opens the Codex desktop app on macOS, it displays a QR code. Scanning that code from the ChatGPT iOS or Android app establishes a secure, authenticated link between the phone and the machine running the coding agent.

From that point, the phone becomes a live window into Codex's work. Developers can review outputs, approve or reject pending tool calls, switch models, start new tasks, and send follow-up instructions — all without opening a laptop. Real-time updates flow back to the phone as Codex works: screenshots of the running app, terminal output, file diffs, test results, and approval prompts arrive in the mobile thread view.

Critically, files, credentials, permissions, and local project context remain entirely on the host machine. OpenAI describes the relay as a "secure layer that keeps trusted machines reachable across devices without exposing them directly to the public internet." The connection routes through OpenAI's infrastructure rather than requiring port-forwarding or direct network exposure.

What You Can Do From Your Phone

The feature set mirrors the full thread-management experience available on desktop:

• Browse and switch threads — view all active and paused Codex threads across connected hosts
• Review outputs — inspect screenshots, diffs, terminal logs, and test results as they arrive
• Approve commands — respond to Codex approval prompts for high-stakes operations without interrupting the desktop session
• Change models — switch between available Codex models mid-session
• Start new tasks — kick off fresh coding tasks on connected machines directly from the phone

Platform Support and Limitations

At launch, mobile pairing is limited to the macOS version of the Codex desktop app. OpenAI confirmed that Windows support is in development but did not provide a release timeline. The feature launched in preview status, meaning some rough edges and limitations are expected as the rollout broadens.

The release reflects a broader trend in developer tooling toward async, mobile-aware workflows. As AI agents take on longer-horizon tasks — sometimes spanning hours — the ability to check in, steer, and approve from a phone becomes practically valuable rather than merely convenient. With Codex now reporting over 4 million weekly active users, the mobile surface significantly expands where developers can interact with their agents.

Availability

Codex in the ChatGPT mobile app is rolling out in preview on iOS and Android. Developers need the latest versions of both the Codex app on macOS and the ChatGPT mobile app. No separate subscription is required beyond an existing ChatGPT plan.