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Codex App Is Incredible! 2026 Latest ChatGPT Codex App Download & Installation Tutorial and China Usage Guide

2/28/2026 Codex AppChatGPT CodexDesktop AppCodex App downloadCodex App installation tutorialUsage in ChinaAI coding agentMulti-agent parallelGit WorktreeSkills LibraryAutomation tasksVS Code integrationLimited-time freemacOS onlyOpenAI CodexClaude Code comparison

Sam Altman announced the official release of the Codex App desktop version on X yesterday, with the first batch supporting Mac (Windows version coming soon). OpenAI has launched the ChatGPT Codex App in a major way, with a limited-time free experience, aiming to provide developers with a top-tier AI coding assistant that fully rivals and surpasses Claude Code.

Codex

On February 2, 2026, OpenAI officially released the ChatGPT Codex App (the Codex App desktop application), a standalone AI coding agent client built specifically for macOS. As OpenAI's "most loved internal product", the Codex App pushes AI agent capabilities to new heights, supporting parallel multi-task processing, automated workflows, and deep IDE integration, delivering a revolutionary coding experience for developers.

This article provides a comprehensive breakdown of the Codex App's core features, characteristics, Codex App download & installation tutorial, and practical usage guide, helping you quickly master this top-tier AI coding tool.

# Table of Contents

1. What Is the ChatGPT Codex App?

ChatGPT Codex App (shortened to Codex App) is a professional AI coding agent (Coding Agent) launched by OpenAI. It was first integrated into the ChatGPT web version in 2025, then the Codex CLI was introduced, and now this standalone Codex App desktop version becomes the true "command center", letting you manage multiple AI agents at once and easily handle complex software development tasks.

Unlike code completion tools such as GitHub Copilot, the Codex App is a truly autonomous coding agent — it not only writes code, but can independently run tests, fix bugs, generate Pull Requests, install dependencies, and refactor entire projects across files. Core positioning: it upgrades from a "code completion tool" to a "virtual software engineer".

The Codex App also brings a limited-time free benefit!

# 🎯 Codex App Limited-Time Policy (February-April 2026)

User type Benefit
Free users & ChatGPT Go Limited-time access to Codex App full features (limited quota)
Plus/Pro/Business/Enterprise/Edu Double rate limits (2x Rate Limits), doubling messages and tasks

codex app

The free account trial quota is limited; for full projects, automation, and Skills features, we recommend opening Plus or Business. The author uses Plus + Business + double quota simultaneously, equivalent to four Plus accounts' usage, making daily projects completely effortless.

2. Codex App Desktop Core Features and Characteristics

# 1. Multi-Agent Parallelism

The Codex App's biggest highlight: it supports running multiple Agents at the same time, each running in an independent thread, isolated per project without interfering with each other. Different tasks can be processed in parallel (e.g., one refactoring code, one writing tests), with seamless context switching.

# 2. Native Git Worktree Support

The Codex App has built-in Git Worktree:

  • Each Agent uses an independent code copy to avoid conflicts
  • Supports multiple Agents operating on different branches of the same repository simultaneously
  • View diffs, add comments, and make staged commits anytime

# 3. Automations

Set up scheduled tasks to let the Codex App run in the background:

  • Automatically generate code review reports
  • Check code standards daily
  • Task results automatically go to the "Inbox"

# 4. Skills Library

The Codex App supports extendable skills, and the Skills Store provides meta-skills such as "Create Skill" and "Skill Installer".

codex skills

Six official OpenAI-verified skills are preinstalled:

  • 🎨 Design-to-code (Figma auto-conversion to code)
  • 📊 Project management (deep Linear integration)
  • 🚀 Cloud-native deployment (one-click launch to Vercel / Netlify / Cloudflare / Render)
  • 🖼️ Visual generation (powered by GPT Image)
  • 📑 Document processing (smart reading/writing of PDF/Excel/Word)
  • 🔌 API development (real-time reference to official OpenAI documentation)

# 5. Deep IDE Integration

Seamlessly syncs with VS Code, Cursor, and Windsurf, with automatic context awareness and cross-platform session history sync.

# 6. Local and Cloud Dual Modes

  • Local mode: code is not uploaded to the cloud, suitable for sensitive projects
  • Cloud mode: uses OpenAI cloud containers, suitable for high-compute tasks

3. How to Download and Install the ChatGPT Codex App

# System Requirements

  • macOS (only Apple Silicon M1/M2/M3/M4 chips supported)
  • ChatGPT account (limited-time free experience)
  • Windows version coming soon; for now, you can use Codex CLI

# Codex App macOS Installation Steps

Step 1: Download
Visit the official OpenAI Codex download page (opens new window) and click "Download for macOS" to get the .dmg file.

codex app

Step 2: Install and log in

  1. Drag the app into the Applications folder
  2. On first launch, log in with your ChatGPT account (Google/Microsoft authorization supported)
  3. No need to manually enter an API Key; permissions are synced automatically

Step 3: Choose a project
Select a local project folder; historical projects sync automatically.

Step 4: Start using
Toggle Local / Cloud mode in the top-left corner and type your request.

# Codex CLI Installation (Command-Line Version)

# npm install (recommended)
npm install -g @openai/codex

# Or Homebrew
brew install codex

# Verify
codex --version

On first run, the browser opens automatically for login, and the token is saved to ~/.codex/token.

4. Detailed Guide to Using the ChatGPT Codex App

# Basic Scenarios

Code review:
"Review the code quality of this project, find performance bottlenecks, and give optimization suggestions"

Feature development:
"Add JWT user authentication to the project, including login, registration, and middleware"

Bug fixing:
"Fix the npm test errors and make sure all tests pass"

Code refactoring:
"Migrate the project from JavaScript to TypeScript"

# Advanced Tips

  • Worktrees: New Agent thread → automatically creates an independent worktree → selectively merge after reviewing changes
  • Automation configuration: Create a new task on the Automations tab, set trigger conditions and permissions
  • Permission modes: Ask / Auto Edit / Full Auto three-level control

5. Codex App Pricing and Limited-Time Free Policy

# Limited-Time Free Experience (February-April 2026)

  • Free users & Go users: full experience of the Codex App
  • Paid users: double rate limits

# Official Pricing (After the Trial Period)

Subscription type Codex App access Rate limits (every 5 hours)
ChatGPT Free Basic features Limited
ChatGPT Plus ($20/month) Full features 30-150 messages / 10-60 cloud tasks
ChatGPT Pro ($200/month) Full features + priority processing 300-1500 messages / 50-400 cloud tasks
Business/Enterprise Admin console + analytics Custom quota

Recommended stable top-up channel for users in China: gptplus.org.cn (opens new window)

6. Codex App vs Cursor, Claude Code Comparison

Feature ChatGPT Codex App Cursor Claude Code
Multi-agent parallel ✅ Multi-threaded ❌ Single session ❌ Single session
Automated tasks ✅ Built-in Automations ❌ Requires plugin ❌ Not supported
Git integration ✅ Native Worktree ⚠️ Basic ✅ Supported
Barrier to entry ✅ No API Key needed ⚠️ Needs setup ⚠️ Needs API Key
Model capability ✅ codex-1 optimized for coding ⚠️ Mixed models ✅ Claude 3.5 Sonnet
Local execution ✅ Local + Cloud ✅ Local ✅ Local
IDE support ✅ Multi-IDE sync ✅ VS Code only ⚠️ Terminal-first

With multi-agent parallel processing and automated workflows, the Codex App is far more efficient than competitors on large projects.

7. Codex App Frequently Asked Questions (FAQ)

Q1: When will Windows users get access?
A: The Windows version is in development and expected to be released within months. For now, you can use WSL + Codex CLI.

Q2: Will Codex App replace programmers?
A: No. It's a productivity enhancement tool, suitable for repetitive tasks, letting developers focus on architecture and innovation.

Q3: Is the code secure?
A: In local mode, code never leaves the device; in cloud mode, OpenAI doesn't use it for training; the enterprise version is SOC 2 compliant.

Q4: How do users in China use it?
A: As long as you can access ChatGPT normally, you can download and use it.

Q5: What's the difference from GitHub Copilot?
A: Copilot is a completion tool, while the Codex App is an autonomous agent that can complete end-to-end tasks.

8. Summary and Usage Recommendations

The release of ChatGPT Codex App (the Codex App) marks the arrival of the "multi-agent collaboration" era in AI programming. Now is the best window to try it — limited-time free + double quota, so we strongly recommend downloading and trying it immediately!

Recommendations:

  • Beginners start with Ask mode
  • For large projects, enable Multi-Agent + Automations
  • For sensitive code, prefer local mode

Codex App download link (official site): openai.com/codex (opens new window)

Go experience the Codex App now and boost your coding efficiency by more than 10x!