01What Codex Mobile Is and How It Works
Codex Mobile is OpenAI's AI coding agent inside the ChatGPT app for iPhone and Android. It lets you control an AI that writes code for you, from anywhere. Your phone becomes a remote control.
The AI does the hard work on your computer.
You don't type code on a tiny screen. Instead, you give the AI a job, like fixing a bug or building a landing page. The AI goes away and does it.
It writes code, fixes bugs, runs tests, and reads your whole project. Then it comes back and shows you the results.
You review the work and tap approve or reject. It's like managing a developer on your team, but from your pocket. The AI keeps working even when you walk away.
Your phone just checks in and steers.
02Key Features of Codex Mobile
Codex Mobile brings several powerful features to your phone. It's not just about starting tasks. It's about full control.
- Remote control: Start, pause, and review coding tasks from your phone.
- Notifications: Get a buzz when a task is complete and ready for review.
- Approve or reject: Tap yes or no on changes the AI made.
- Request changes: Tell the AI what to fix, and it goes back to work.
- Multiple tasks: Run several coding jobs at the same time.
- Switch models: Change AI models on the fly from your phone.
- Local execution: The actual coding happens on your own computer, not in the cloud.
These features turn your phone into a mission control dashboard. You check in, approve stuff, and steer the AI. It keeps going.
03How to Set Up Codex Mobile
Setting up Codex Mobile is simple. It's already inside the ChatGPT app. You just need to know where to look.
- Open the ChatGPT app on your iPhone or Android phone.
- Make sure you have Codex enabled. It's a separate tool inside the app.
- Ensure your computer is on and connected to the internet. The AI works there.
- Link your phone to your computer. This might require a QR code or login. The episode doesn't give exact steps, but it's part of the ChatGPT setup.
- Start a new task. Type or speak what you want the AI to do.
- Put your phone down and let the AI work. You'll get a notification when it's done.
That's it. You don't need to be at your desk. The AI does the heavy lifting on your machine.
04How to Use Codex Mobile in Real Life
Using Codex Mobile is about delegating, not coding. Here's an example from the episode. Julian wanted to grow the AI Profit Boardroom.
He opened Codex on his phone and said, build me a landing page for the AI profit boardroom that shows the benefits of AI automation, highlights community features, includes testimonial sections, and has a clear call to action to join.
Then he put his phone in his pocket and went to grab a coffee. Ten minutes later, his phone buzzed. Task complete.
Ready for review. He opened it up. A full landing page with a clean design and benefit sections.
He tapped approve.
You can also run multiple tasks at once. For example, one agent builds a signup page. Another fixes a bug on your checkout flow.
A third creates an automated welcome sequence. You check in on each one from your phone, approve or reject, and steer.
05Results and Comparisons Shown in the Episode
The episode shows a clear before-and-after comparison. The old way: you sit at your desk, open your laptop, and type for hours or days. You fix one bug and three new ones pop up.
The new way: you open ChatGPT on your phone, tell Codex what you need, and put your phone down. You go make dinner or take a walk. The AI keeps working.
Your phone buzzes when it's done.
In the example, a landing page that used to take a developer days took 10 minutes with Codex Mobile. The AI built a full page with benefit sections and a call to action. Julian didn't even sit at a desk.
OpenAI is also comparing against competitors. Anthropic has Claude Code. GitHub has Copilot Agents.
Cursor is doing async coding. The whole industry is moving this way, but OpenAI is pushing hard with this mobile update.
06Tips, Limits, and Mistakes to Avoid
Codex Mobile is still in preview mode. It's not perfect yet. Don't expect it to handle every complex task flawlessly.
The direction is clear, but there will be hiccups.
One big tip: always review the AI's work. Don't just tap approve blindly. Check the output.
If something looks wrong, tell the AI what to fix and send it back to work.
Another tip: use multiple tasks for bigger projects. Instead of one long task, break it into smaller jobs. That way you can check in on each one and catch issues early.
Avoid the mistake of thinking your code is safe in the cloud. It's not. The coding happens on your own machine.
Your files, passwords, and keys stay on your computer. Nothing gets shipped off to a random server. This is great for security, especially if you handle sensitive client data.
07Who Codex Mobile Is For and Why It Matters
Codex Mobile is for business owners, developers, and anyone who wants to scale without hiring a massive team. If you run a business, you can delegate coding tasks while you're away from your desk. You can build landing pages, fix bugs, and automate workflows from your phone.
It matters because it shifts the skill from coding to managing AI. You don't need to know every line of code. You need to know how to give clear instructions and review the results.
That's a completely different skill.
This is part of a bigger trend called ambient AI. AI that runs in the background all day and night, working on your stuff. Codex Mobile is one of the first real examples.
It's a step toward a future where your business gets built while you sleep.
08The Future of Codex and AI Agents
The episode looks ahead. OpenAI is building a super app. They have Atlas, an AI browser.
They have Operator, an AI that uses websites for you. And now Codex, an AI that codes for you. The pattern is clear: AI agents for everything—browsing, coding, search, tasks.
They'll all run in the background.
Competitors are following. Anthropic has Claude Code. GitHub has Copilot Agents.
Cursor is doing async coding. But OpenAI's mobile update puts them at the front.
This is the beginning of a world where business owners stop doing everything manually. Instead, they manage AI that does the work. Codex Mobile is a first real glimpse of that future.
