Codex Desktop–Mobile Sync with a Cloud Computer

Melvin Vivas · X post · 2026-09-04 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

The creator started a Codex chat on his phone while his laptop was turned off. Codex desktop syncs with mobile, and the work runs on a computer in the cloud, so you don't need your own machine running.

Key points

• Codex desktop and Codex mobile sync the same chats.
• You can start a coding task from your phone with your laptop turned off.
• The task runs on a computer in the cloud, not on your local machine.

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

Try this

• Try starting a Codex task from your phone and continue it on desktop.