OpenAI is putting Codex on phones. The company's coding agent is rolling out in preview inside the ChatGPT mobile app for iOS and Android, per an OpenAI announcement Thursday. The actual work still happens on a laptop, Mac mini, or devbox. The phone is a control surface.
From the app, users can answer questions, review outputs, approve commands, and switch models while Codex grinds away on a connected machine. Files, credentials, and local setup stay put on that machine. Updates flow back through what OpenAI calls a secure relay layer that keeps trusted machines reachable without exposing them to the public internet.
The preview ships across all plans, including the free tier and the entry-level Go plan. One catch: the mobile app only connects to the Codex app on macOS for now. Windows support is "coming soon," with no date attached.
OpenAI says Codex now has more than 4 million weekly users, a company-reported figure with no independent baseline. Alongside the mobile rollout, Remote SSH is going generally available, letting Codex connect into approved remote dev environments. Enterprise and Business workspaces also pick up programmatic access tokens for CI pipelines and internal automations. HIPAA-compliant Codex use is being extended to Enterprise customers in the CLI, IDE, and Codex app, but only when running locally.
To try the mobile preview, users need to update both the ChatGPT mobile app and the Codex app on macOS.
Bottom Line
Codex on phone only pairs with the macOS desktop app at launch; Windows pairing has no shipping date.
Quick Facts
- Rollout: preview on iOS and Android, all supported regions
- Available on all plans, including Free and Go
- 4 million weekly Codex users (company-reported)
- Mobile connects only to Codex on macOS at launch
- Remote SSH now generally available across plans
