OpenAI has released a new way to interact with its Codex app from your smartphone. An update to ChatGPT's mobile app brings remote access to Codex for Mac to the iPhone, iPad, and Android. This integration allows developers to stay connected to their coding agent even when they are away from their computer, enabling a more fluid and responsive collaboration with AI.
Codex mobile access lives inside the ChatGPT app
While Codex is a standalone app on the Mac, OpenAI is putting remote access features inside the ChatGPT mobile app. The company announced today, "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." This move recognizes that as AI agents take on longer-running and more complex tasks, developers need a way to oversee progress, answer questions, and make decisions without being tied to a desktop machine.
OpenAI points to uses around approving Codex tasks and starting new prompts for the system from your phone while you're away from your computer. The integration is designed to handle the rhythm of modern collaborative coding, where a user might need to quickly review what Codex has found, change the direction of a project, or add a new idea in real time. The company states, "Codex in the ChatGPT mobile app is a fully-featured mobile experience for getting work done with Codex."
How Codex remote access works
When you connect to any of your machines where Codex is running—whether that is your laptop, a dedicated Mac mini, or a managed remote environment—the app loads the live state from that environment. This allows you to work fluidly across active threads, approvals, plugins, and project context. The setup process on the Mac app involves generating a QR code that you scan from the ChatGPT mobile app on iOS or Android. Once paired, the mobile interface mirrors the current state of your Codex session, showing screenshots, terminal output, diffs, test results, and pending approvals.
OpenAI emphasizes that this is more than basic remote control. "This is more than the ability to remotely control a single task or dispatch new tasks to your computer," the company explains. "From your phone, you can work across all of your threads, review outputs, approve commands, change models, or start something new. Your files, credentials, permissions, and local setup stay on the machine where Codex is operating, while updates flow back to your phone in real time."
Background and evolution of Codex
Codex first arrived on the Mac in February 2026, after initially launching as a command line interface tool. It is an AI agent designed to automate coding tasks, from writing and debugging code to running tests and deploying applications. The Mac app introduced a graphical interface and the ability to interact with Codex via natural language, making it accessible to a wider range of developers. Last month, Codex gained the ability to use apps on your computer without taking over the cursor, meaning you could run tasks in the background while continuing to use your machine for other work.
This remote access update builds on that parallel execution capability, allowing users to disengage from their computer entirely while Codex continues working. For example, a developer could initiate a long-running code refactor on their Mac, leave the office, and later approve or reject changes from their phone while commuting. The mobile interface provides enough context—such as diffs and test results—to make informed decisions without needing to return to a full desktop environment.
Integration with OpenAI ecosystem
The update comes alongside other recent enhancements to OpenAI's AI platform. The company recently introduced a subscription designed specifically for Codex users, offering priority access and higher usage limits. OpenAI also released GPT-5.5, which upgrades the capabilities of both ChatGPT and Codex, along with Images 2 for advanced image generation. These updates signal OpenAI's commitment to building a comprehensive suite of AI tools for developers, with Codex serving as the coding-specific agent within the broader ChatGPT ecosystem.
Codex's remote access feature is available now as a preview on iOS and Android in all supported regions. Users need the latest version of Codex for Mac and the ChatGPT app for iOS or Android to get started. OpenAI has confirmed that support for remotely controlling Codex for Windows will follow, extending the feature to a larger developer base. The company posted on social media, "Rolling out today as a preview on iOS and Android in all supported regions. Support for connecting your phone to the Codex app on Windows is coming soon."
Implications for developer workflows
This integration reflects a broader industry trend of AI agents performing background tasks that require human oversight only at key decision points. By decoupling the human from the machine, OpenAI enables a more asynchronous collaboration model. Developers can now treat Codex as a persistent assistant that runs on their hardware, checking in periodically via their phone rather than sitting in front of a monitor all day. This could be particularly beneficial for teams working across time zones or for individuals who need to monitor code generation while attending meetings or handling other responsibilities.
However, the approach also raises questions about security and privacy. OpenAI notes that files, credentials, permissions, and local setup stay on the machine where Codex is operating. The mobile app only receives real-time updates, not the underlying data itself. This architecture aims to balance convenience with control, ensuring sensitive information never leaves the user's local environment. Still, developers will need to evaluate whether remote access to a coding agent on their machine introduces any new attack surfaces, especially when using managed remote environments.
The move also positions Codex against competitors like GitHub Copilot, which offers similar AI-powered coding assistance but has not yet integrated remote mobile control in the same way. By embedding Codex access inside the ChatGPT app—already widely used for general AI queries—OpenAI lowers the barrier for existing ChatGPT users to try Codex. The feature could drive adoption among mobile-first developers and those who frequently work on the go, further entrenching OpenAI's role in the developer tools market.
Technical details and limitations
The mobile experience relies on a persistent connection between the ChatGPT app and the Codex-running machine. Users must have the Codex Mac app installed and running, and the mobile app must be on the same network or able to reach the machine via a remote environment. OpenAI recommends using a dedicated Mac mini or a managed remote environment for continuous availability, though a laptop can also serve as the host. The mobile interface replicates the thread-based organization of the Mac app, allowing users to switch between multiple active projects and review the history of commands and outputs.
One limitation is that the mobile app cannot initiate new coding sessions on a machine that is not already running Codex; it can only connect to an existing environment. Also, the Windows support has not yet arrived, which limits the feature to Mac users for now. Given that many developers work on Windows machines, the upcoming Windows integration will be critical for widespread adoption.
OpenAI has not disclosed specific battery or data usage statistics for the remote connection, but the real-time updates—including screenshots and diffs—could consume noticeable mobile data if used extensively. The company recommends using Wi-Fi when possible, especially for large projects with frequent updates.
Codex only arrived on the Mac in February after starting out as a command line interface tool. Its rapid evolution from CLI to desktop app to mobile companion illustrates OpenAI's aggressive push into AI-assisted software development. With GPT-5.5 underpinning the reasoning capabilities, Codex can now handle more complex multi-step tasks, making mobile oversight even more valuable. The combination of background execution, parallel use, and now remote access suggests that OpenAI envisions Codex as an always-on partner that fits into the developer's daily workflow, not just a tool they sit down to use.
Source: 9to5Mac News