OpenAI announced on May 29, 2026 that Windows 11 users of the Codex app can now remotely enable and manage computer use sessions directly from the ChatGPT mobile app on iOS and Android. The update, delivered via a server-side switch and an app update, bridges the gap between desktop AI coding and on-the-go monitoring. Codex users who have been waiting for tighter mobile integration can finally kick off complex coding tasks, monitor progress, and even intervene without being tethered to their PC.

This new capability arrives as part of Codex version 2.5.1 on Windows and ChatGPT mobile version 9.3.0. The feature requires Windows 11 build 26100 or later and a computer with a modern neural processing unit (NPU) to handle the AI-driven computer use models locally. Microsoft’s ongoing NPU push in Copilot+ PCs and open-ecosystem devices like the Surface Laptop 7 and ASUS Zenbook S 16 means a growing number of machines ship with the necessary hardware. For those without an NPU, a fallback cloud processing option is available, though it introduces slight latency.

What Exactly Is “Computer Use” in Codex?

Computer use, as OpenAI defines it, is the ability for Codex to autonomously operate a user’s machine under strict guardrails. It can navigate file systems, open applications, run terminal commands, edit code, and even interact with GUI elements—all driven by natural language prompts. With the new mobile integration, you can start a computer use session from your PC, then walk away and keep tabs on it from your phone. The ChatGPT app becomes a remote console, showing a live thumbnail of the desktop, a running transcript of actions taken, and options to pause, resume, or terminate the session with a single tap.

This isn’t traditional screen mirroring. Instead, the mobile app acts as a secure relay, receiving encrypted snapshots and logs from the Codex runtime on the PC. User interactions, such as granting elevated permissions or approving a risky command, pop up as push notifications on the phone, much like a two-factor authentication prompt. Tapping approve sends a signed token back to the PC, enabling the action to proceed.

How to Set It Up

Getting started requires just a few steps. First, ensure your Windows 11 PC meets the hardware requirements and has the latest Codex app installed from the Microsoft Store. Next, update the ChatGPT app on your iPhone or Android device. Sign into both with the same OpenAI account. In the Codex desktop app, navigate to Settings > Remote Control and toggle on Enable Mobile Management. You’ll be prompted to scan a QR code using the ChatGPT mobile app, which pairs the devices over an end-to-end encrypted channel. Once paired, your PC appears in the ChatGPT app’s Devices tab, showing its online status and the current Codex session state.

From there, you can tap “Start Computer Use” on the mobile device, which sends a wake-on-LAN packet if the PC is sleeping, then launches Codex in the background. The interface is deliberately minimal: a live viewport of the screen, a chat bar to issue new prompts, and a timeline of recent actions. Swipe right on an action to undo it; long-press to add a comment or flag an issue. For developers juggling multiple machines, the app supports up to five registered PCs, cycling through them with a carousel at the top.

Practical Scenarios for Developers and Power Users

The most obvious beneficiary is the remote developer. Imagine kicking off a large refactor before leaving the office. On the train home, you notice the build failed because a library was missing. You can prompt Codex to install it, re-run the build, and verify the output—all from your phone. No need to SSH into a server or fumble with RDP over a spotty connection. The session continues with the same context and environment as if you were sitting at your desk.

But the utility extends beyond coding. Data analysts running overnight data processing scripts can check results and adjust parameters without opening a laptop. Content creators rendering video projects can monitor progress and pause or tweak settings on the fly. Even IT administrators can use it to remotely manage test environments, applying patches or restarting services with natural language. Early adopters in the OpenAI community have already shared stories of using the feature to monitor machine learning training runs, catching overfitting early and adjusting hyperparameters from their couch.

Security and Privacy Underpinnings

Allowing an AI to control a PC remotely raises immediate security questions. OpenAI and Microsoft collaborated on a layered defense model for mobile-initiated sessions. All traffic between the mobile app and the PC flows through encrypted tunnels with mutual TLS authentication. The PC’s local NPU processes the screen content and action logs, meaning no raw desktop imagery leaves the machine unless it’s compressed and encrypted for the mobile viewport. Even then, the video stream is ephemeral and never stored on OpenAI’s servers.

User consent gates protect sensitive operations. Any action requiring administrator privileges triggers a biometric prompt on the mobile device—Face ID, fingerprint, or Android’s strong biometric unlock—before the approval token is generated. A hardware-bound key prevents man-in-the-middle attacks. Additionally, the mobile app can be configured to require explicit approval for actions in protected folders like Documents, Downloads, or custom paths. Codex also logs every action to the Windows Event Viewer, making it auditable for enterprise admins already using Microsoft Intune to manage Codex deployments.

Community Reactions and the Competitive Landscape

On forums and social media, the reception has been largely positive. A popular thread on /r/OpenAI praised the responsiveness: “I was skeptical about latency, but on 5G the screen updates are near-instant. It feels like magic.” Others, however, expressed concerns about battery drain on the PC side. A reviewer at Windows Central noted a 12% hit to battery life on a Surface Pro 11 during a 30-minute session, though performance was unaffected. Some users on X (formerly Twitter) compared the feature to Microsoft’s Phone Link and Remote Desktop, but the AI-native control sets Codex apart. Where Phone Link mirrors a full interactive desktop, Codex’s computer use is a goal-oriented agent that only surfaces what’s relevant.

Analysts see this as OpenAI strengthening its ecosystem lock-in. By making Codex sessions accessible only through the ChatGPT mobile app, the company encourages users to adopt both platforms deeply. Competitors like GitHub Copilot (which also runs on Windows 11 and integrates with VS Code) currently lack a comparable first-party remote control feature, though Copilot’s partnership with Spotify Car Thing was a different experiment that fizzled. Independent tools like AnyDesk and TeamViewer offer remote control but without AI orchestration. The unique combination of goal-driven task execution and mobile oversight gives Codex an edge that may be hard to replicate.

Limitations and Known Issues

No launch is flawless. Early documentation flags a few constraints. The mobile app cannot initiate a computer use session if the PC is turned off and does not support Wake-on-Wireless. It relies on a wired Ethernet connection or a Wi-Fi adapter that stays powered during sleep. Some users on reddit reported that the pairing QR code occasionally fails to scan on older Android phones; a manual 12-digit code entry workaround exists but is buried in the settings. Additionally, sessions are capped at four hours for free-tier Codex plans. Pro and Enterprise subscribers enjoy eight-hour limits with the option to extend via an in-app confirmation.

OpenAI also warns that the feature is still in “beta” for computer use tasks that involve specialized software like CAD tools or non-standard UI frameworks. Codex may misinterpret interface elements in those applications, leading to errant clicks. A human-in-the-loop is recommended for any task costing money or dealing with irreplaceable data.

Looking Ahead: The Road to Full Mobile Control

May 2026’s rollout is just the beginning. According to a leaked roadmap from February, OpenAI plans to add voice-based commands to the mobile app by Q3 2026, allowing hands-free operation akin to a digital assistant for your PC. Deeper integration with Siri Shortcuts and Android’s Quick Phrases would enable users to issue commands like “Hey Siri, ask Codex to clean up my desktop” without opening the app. Microsoft is also expected to bring similar functionality to the Microsoft 365 Copilot experience on Windows, though that remains an untethered assistant rather than a direct controller.

The most intriguing prospect is bidirectional mirrors. Imagine starting a computer use task on your iPhone—say, analyzing a spreadsheet with Codex’s Python runtime—and having the heavy lifting happen on your PC while you view results on the phone. That would turn the mobile device into a thin client powered by the PC’s compute. Neither OpenAI nor Microsoft have confirmed this, but the underlying architecture supports it.

For now, the ability to control active Codex work from the ChatGPT mobile app transforms how developers and power users interact with their machines. It erases the boundary between sit-down productivity and always-available oversight. Whether you’re waiting for a coffee or boarding a flight, your Windows 11 PC is never truly out of reach.