Discover Codex’s Hidden Features: Browser Integration, High‑Power Model Mode, and More

1. Browser Capability

Codex’s built‑in browser can import Chrome cookies and passwords, allowing the ChatGPT browser to act like native Chrome. All logged‑in sites become accessible without re‑entering credentials. Path: Settings → Browser → General → Import . Screenshots show the import screen and a sample site ("X") displaying logged‑in content.

2. Model Inference Strength

The front‑end default offers five inference levels; a hidden Maximum level can be enabled manually. Path: Settings → Configuration → Model → Available Inference Strength . A screenshot illustrates the toggle.

3. Import Work from Other AI Apps

This long‑standing feature now supports more content types. Path: Settings → General → Import Work from Other AI Apps . The author demonstrates importing Claude Code settings, plugins, Skills, projects, and chat history into Codex without friction, with accompanying screenshots.

4. Computer Control

Codex’s computer‑control abilities have been strengthened. The author recommends enabling all options, noting a recent test where an app was controlled with deep interaction, feeling like a GPT‑5.6‑powered robot typing and moving the mouse. Screenshots document the control panel and the test run.

5. Application Snapshot

A shortcut key can instantly send the frontmost window’s content to Codex, providing the simplest screenshot‑to‑dialogue workflow. The author shows the shortcut configuration and the resulting snapshot view.

6. Overlooked GPT‑5.3‑Codex‑Spark

When the quota is near exhaustion, the GPT‑5.3‑Codex‑Spark model remains viable. The author shares a tip: assign a complex task just before the quota runs out, keep the model set to GPT‑5.6 high, and increase speed to 1.5. Screenshots illustrate the setting.

7. Phone Remote Control & Inter‑Mac Linking

The author’s iPhone can control two Mac computers, and the Macs can control each other. Screenshots display the remote‑control interface and the inter‑Mac connection.

8. Memory & Chronicle Preview

Memory acts as a mutable work notebook to reduce repeated context provision. Path: Settings → Personalization → Memory . The author compares Memory with AGENTS.md in a table, highlighting differences in content, reliability, scope, edit method, and suitable use cases. Chronicle, a more aggressive feature, can generate local memory from recent screen content, reducing context prompts but consuming quota and introducing privacy and prompt‑injection risks.

9. Plugins

The author links to a previous article recommending many Codex plugins and notes that new plugins are frequently added, offering deep utility.

10. Call for Feedback

Readers who find the guide useful are encouraged to like, share, and comment.