OpenAI is bringing Codex to the ChatGPT mobile app, making its coding agent available on iOS and Android in preview across all ChatGPT plans, including Free and Go. This release transforms the phone into a control surface for Codex sessions already running on a laptop, Mac mini, devbox, or managed remote environment, rather than transferring the codebase onto the phone. Developers can start work, inspect active threads, review outputs, approve commands, switch models, add new context, and follow terminal output, screenshots, diffs, test results, and approvals in real time. Files, credentials, permissions, and local setup remain on the machine where Codex is operating.
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The move pushes Codex further toward long-running agent supervision. OpenAI states that the mobile app can load live state from the environment where Codex is running, while a secure relay layer keeps trusted machines reachable across devices without exposing them directly to the public internet. This makes the phone useful for the short decision points that usually block agentic coding work: clarifying instructions, choosing between implementation paths, approving commands, or reviewing a diff before returning to the desktop.
OpenAI is also expanding Codex for enterprise workflows. Remote SSH is now generally available, allowing Codex to connect into approved remote development environments with company dependencies, credentials, security policies, and compute resources. The Codex desktop app can detect SSH hosts from a user’s SSH config and run projects inside those remote machines. Hooks are now generally available too, with use cases such as:
- Scanning prompts for secrets
- Running validators
- Logging conversations
- Creating memories
- Customizing Codex behavior by repository and directory
Availability is split by capability. Codex mobile preview is rolling out in the ChatGPT app on iOS and Android in supported regions, with users asked to update both ChatGPT mobile and the Codex app on macOS. Windows phone-to-Codex desktop support is still listed as coming soon. Remote SSH and Hooks are available on all plans. Programmatic access tokens are limited to Enterprise and Business plans, while HIPAA-compliant Codex use applies only to eligible ChatGPT Enterprise workspaces using local environments.
This release follows OpenAI’s earlier Codex app launch, which positioned Codex as a command center for managing multiple coding agents, parallel threads, worktrees, skills, automations, and long-running software tasks. The new mobile layer extends that direction by making Codex less dependent on a developer sitting at one workstation, while still keeping execution tied to the machine or remote environment where the project actually lives.
