Codex on Mobile: Code with ChatGPT in 15 Minutes

Tutorial Objectives

Learn to use the built-in Codex function of ChatGPT mobile version in 15 minutes to write code anytime and anywhere. This article is a complete step-by-step tutorial, from installation to completion of the first project.

What will you build?

• Remote Coding Environment: Open ChatGPT on your mobile phone and start the Codex terminal directly
• Code Warehouse Connection: Connect Codex to GitHub warehouse and edit in real time on mobile phone
• Project Deployment: Use Codex to complete a small web application and deploy it online

Preparation list

• ChatGPT account (the free version is enough, supports the basic functions of Codex)
• Smartphone (iOS or Android, install ChatGPT official app)
• GitHub account (optional, used for warehouse synchronization) -Basic programming concepts (not required, novices can also follow along)

Overall architecture

The tutorial is divided into 4 modules. If you follow the sequence, you can start from scratch and complete a real coding project with your mobile phone in 15 minutes.

Step 1: Install and start Codex

Open the ChatGPT mobile app and make sure you've upgraded to the latest version (check the iOS App Store or Google Play store for updates).

There are two ways to start Codex:

Upon startup, ChatGPT automatically creates a Codex session. You'll see a terminal-style interface with input boxes at the bottom. This is your mobile development environment.

Tip: Codex is also available in the free version of ChatGPT. All you need to do is log in to your ChatGPT account. The paid version (Plus/Pro) offers faster models and higher usage limits.

Step 2: Create your first project

Enter a natural language command into the Codex terminal to describe the code you want to build. There is no need to remember the specific command syntax.

For example, enter:

 Python Flask Web ， REST API
， /hello JSON

Codex 、。 1. 2. （ Flask） 3. 4.

， ChatGPT Plus GPT-4 。

3 GitHub

Codex GitHub 。

Codex 。，

• （Codex ）
• （/github commit -m "Update instructions"）

****， /github init ，Codex 。

4

，Codex 。

Codex （ Render、Fly.io Railway），， URL。

，Codex 。 Codex CLI ， ChatGPT 。

（FAQ）

Q1Codex ，？

。ChatGPT ，，Codex 。。

Q2 Codex ？

、。、；、、。 ChatGPT 。

Q3 Codex ？

，。Plus （$20/） GPT-4 。

SEO+GEOFAQ AI ，"Codex "、""。

（）

， tools hover-card OpenAI、ChatGPT、Codex、Flask、GitHub

Reference video/material

• OpenAI ：Codex is now in the ChatGPT mobile app
• HN ：Codex

Internal link guidance

• Someone has successfully practiced it: a real case of an independent developer using AI coding tools to automate workflow and earning $5,000 per month: Indie Developer: n8n + OpenClaw Automation Workflow Earning $5,000/mo
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