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OpenAI Brings Codex to the ChatGPT Mobile App

The rollout underscores a race with Anthropic’s Claude Code to put agentic coding tools on every device.

Overview

  • OpenAI began rolling out a preview Thursday that lets the ChatGPT phone app control Codex sessions running on a user’s computer.
  • From a phone, users can review outputs, approve commands, switch models, start new work, and manage any Codex thread.
  • OpenAI says files, credentials, permissions, and the local setup stay on the host machine as the app streams screenshots, terminal logs, diffs, and test results in real time.
  • The preview works on iOS and Android for all ChatGPT plans, including the free and Go tiers, and for now it connects only to Codex running on macOS.
  • The mobile link uses a relay that reaches trusted machines without exposing them to the public internet, and it also adds access to remote enterprise environments over SSH.