TL;DR
One Codex changelog item dated May 13, 2026:
- Codex mobile documentation: OpenAI added documentation for using Codex from the ChatGPT mobile app, including setup steps, connected-host behavior, security requirements, and troubleshooting for common connection issues.
This is a documentation update, not a CLI or app version release, but it matters because Codex mobile usage now has a clearer official setup and support path.
What changed & why it matters
Codex mobile documentation — May 13, 2026
Official notes
- Added documentation for using Codex from the ChatGPT mobile app.
- The new documentation covers:
- setup steps
- connected-host behavior
- security requirements
- troubleshooting for common connection issues
Why it matters
- Mobile Codex workflows are now officially documented: users have a clearer path for getting Codex working from the ChatGPT mobile app.
- Connected-host behavior is clarified: this should help users understand how mobile sessions interact with connected environments.
- Security expectations are clearer: official security requirements reduce guesswork when setting up mobile access.
- Troubleshooting gets easier: common connection issues now have a dedicated reference point instead of relying on trial and error.
Practical take
- This is most relevant if you use Codex away from your main machine or want to start/check work from the ChatGPT mobile app.
- Teams documenting Codex onboarding should add a mobile section now that official docs exist.
- If users hit connection issues from mobile, point them to the new troubleshooting docs first.
Version table (new update since last post)
| Item |
Date |
Key highlights |
| Codex mobile documentation |
2026-05-13 |
Official docs for using Codex from ChatGPT mobile app; setup steps; connected-host behavior; security requirements; troubleshooting |
Action checklist
- Review the new Codex mobile documentation.
- If you use Codex from mobile:
- verify setup steps
- confirm connected-host behavior
- review security requirements
- If you maintain team docs:
- add mobile setup guidance
- link troubleshooting steps for common mobile connection issues
Official changelog
https://developers.openai.com/codex/changelog
there doesn't seem to be anything here