Codex in the ChatGPT Mobile App: Steer Coding Agents from Your Phone

Melvin Vivas · X video post · 2026-05-14 · 1:04 · 163 views · Open on X

Topics: AI Dev Tools & Productivity, AI Agents, Tool Use & MCP · Level: beginner

Summary

Melvin Vivas shares OpenAI's announcement that Codex is now in preview inside the ChatGPT mobile app for iPhone and Android. From your phone you can start new Codex tasks, review outputs, steer execution and approve next steps. The work itself keeps running on your own machine (laptop, Mac mini or devbox) through the Codex desktop app, which is Mac-only for now. The video has no spoken content, so this note is based only on the caption and the quoted post.

Key points

• Codex is now in preview inside the ChatGPT mobile app on both iPhone and Android.
• The mobile app connects to the Codex desktop app; Melvin notes this is Mac-only right now.
• From mobile you can start new work, review outputs, steer execution and approve next steps.
• The agent keeps running on your own hardware (laptop, Mac mini or devbox); the phone works as a remote control.
• Workflow pattern: leave a long-running coding agent on an always-on machine and check in or approve its steps from your phone.
• The video has no spoken explanation; all details come from the caption and the quoted OpenAI post.

Resources mentioned

• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more
• Codex desktop app (Mac) · tool · openai.com · paid
  Desktop app that runs Codex locally; the mobile app connects to it to control tasks remotely.
  Also in: Editing a GitHub Repo From ChatGPT Work on iOS (Melvin Vivas on X · notes)
• ChatGPT · tool · chatgpt.com · free · recommended by both Bashiri Smith & Melvin Vivas
  OpenAI's AI assistant (web, desktop and mobile apps), used for chat, coding, writing and image generation.
  Also in: Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Dots Demo: A Voice AI Agent Handling Travel Booking and Feedback Triage (Melvin Vivas on X · notes), ChatGPT Can Commit Code Directly to Your GitHub Repo (Melvin Vivas on X · notes), OpenAI Dots: Agents Inside ChatGPT That Debug, Fix, and Open PRs (Melvin Vivas on X · notes) and 23 more

Try this

• Install or update the ChatGPT mobile app and look for Codex (preview).
• If you use a Mac, set up the Codex desktop app so your phone can connect to it.
• Try starting a Codex task on your machine, then review and approve its steps from your phone.