#What’s a codex

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opal linden
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I am new explain a codex that people are doing

pearl oliveBOT
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Hi @opal linden. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

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Codex is an AI coding agent developed by OpenAI that helps you write, review, and ship code faster. You can use Codex in your terminal or IDE (like VS Code or Cursor) to pair program with it—meaning you can give it a prompt or a specification, and Codex will navigate your code repository, edit files, run commands, and execute tests. This makes it useful for tasks like shipping new features, fixing bugs, brainstorming solutions, or automating repetitive programming work.

You can also delegate tasks to Codex in the cloud, where it works in an isolated environment with your codebase. It can generate code, review pull requests, and even automate code reviews directly within GitHub, acting much like a human colleague would. Codex is available through tools like the Codex CLI and IDE extensions, and is included with ChatGPT Plus, Pro, Business, Edu, and Enterprise plans. You don’t need to set up API keys if you sign in with your ChatGPT account—just install the extension or CLI and start coding with Codex’s help.

In summary, Codex is like having an AI-powered coding assistant that can help you with a wide range of software development tasks, both locally and in the cloud, making your workflow faster and more efficient Using Codex with your ChatGPT plan.

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

opal linden
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Give a example

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Give a example

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@pearl olive give a example

pearl oliveBOT
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Let me check the knowledge base for you again. One moment! :books:

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Certainly! Here’s a simple example of how Codex can be used in a real-world workflow:

Example: Automatically Fixing CI Failures with Codex

Suppose you have a GitHub repository with automated tests. Sometimes, when you push code, the tests fail. With Codex, you can set up a GitHub Action that automatically tries to fix these failures for you:

  1. Codex detects a failed CI run.
  2. It checks out the failing branch and installs dependencies.
  3. Codex analyzes the code and test results, then generates a minimal fix to make the tests pass.
  4. It runs the tests again to verify the fix.
  5. If successful, Codex creates a pull request with the fix for you to review.

Here’s a snippet of the GitHub Action workflow that enables this automation:

name: Codex Auto-Fix on Failure

on:
  workflow_run:
    workflows: ["CI"]
    types: [completed]

permissions:
  contents: write
  pull-requests: write
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jobs:
auto-fix:
if: ${{ github.event.workflow_run.conclusion == 'failure' }}
runs-on: ubuntu-latest
env:
OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
steps:
- name: Checkout Failing Ref
uses: actions/checkout@v4
with:
ref: ${{ github.event.workflow_run.head_sha }}
fetch-depth: 0
- name: Setup Node.js
uses: actions/setup-node@v4
with:
node-version: '20'
- name: Install dependencies
run: |
if [ -f package-lock.json ]; then npm ci; else npm i; fi
- name: Run Codex
uses: openai/codex-action@main
id: codex
with:
openai_api_key: ${{ secrets.OPENAI_API_KEY }}
prompt: "You are working in a Node.js monorepo with Jest tests and GitHub Actions. Read the repository, run the test suite, identify the minimal change needed to make all tests pass, implement only that change, and stop. Do not refactor unrelated code or files. Keep changes small and surgical."
- name: Verify tests
run: npm test --silent
- name: Create pull request with fixes
if: success()
uses: peter-evans/create-pull-request@v6
with:
commit-message: "fix(ci): auto-fix failing tests via Codex"
branch: codex/auto-fix-${{ github.event.workflow_run.run_id }}
base: ${{ github.event.workflow_run.head_branch }}
title: "Auto-fix failing CI via Codex"
body: |
Codex automatically generated this PR in response to a CI failure.

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With this setup, Codex acts as an AI assistant that helps keep your codebase healthy by automatically proposing fixes when tests fail, saving you time and manual effort Use Codex CLI to automatically fix CI failures.

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Let me check the knowledge base for you again. One moment! :books:

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No problem! Here’s a very simple explanation:

Codex is like an AI helper for people who write computer code.
If you don’t code, imagine Codex as a smart assistant that can read instructions, look at a project, and do tasks for you—like fixing mistakes, writing new features, or checking if everything works. It’s used by developers to save time and avoid boring, repetitive work.

For example, if a team is building a website and something breaks, Codex can look at the problem, try to fix it, and even suggest improvements—all automatically. It’s like having a robot assistant for computer programming Using Codex with your ChatGPT plan.

You don’t need to know how to code to understand that Codex helps people who do, by making their work faster and easier!

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Let me check the knowledge base for you again. One moment! :books:

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Yes, a person who doesn’t know coding can use Codex to create code for them by simply describing what they want in plain language (a "prompt"). Codex is designed to understand instructions written in everyday language and turn them into working code. For example, you could say, “Make a simple website that shows today’s date,” and Codex would generate the code for you.

However, while you don’t need to know how to code to get started, having some basic understanding of what you want to build or how to describe your needs clearly will help you get better results. Codex is included with ChatGPT Plus, Pro, Business, Edu, and Enterprise plans, and you can use it in tools like the Codex CLI or IDE extensions Using Codex with your ChatGPT plan.

So, even if you’re not a coder, you can use Codex to help create code by giving it instructions in your own words!

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

opal linden
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@pearl olive I am a plus member do I get it free?

pearl oliveBOT
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Let me check the knowledge base for you again. One moment! :books:

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Yes, as a ChatGPT Plus member, you get access to Codex included with your subscription—there is no extra charge beyond your Plus plan fee. You can use Codex in your terminal, IDE (like VS Code), on the web, in GitHub, and even from the ChatGPT iOS app. Just sign in with your ChatGPT Plus account to start using Codex features Using Codex with your ChatGPT plan.

However, there are usage limits for Plus members. On average, you can send about 30–150 local Codex messages or 5–40 cloud Codex tasks every 5 hours, depending on the size and complexity of your coding tasks Codex usage limits by plan.

So, as a Plus member, you do get Codex access at no extra cost, but with some usage limits.

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

opal linden
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@pearl olive what are some things you could see someone of my caliber using codex to make?

pearl oliveBOT
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Let me check the knowledge base for you again. One moment! :books:

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Absolutely! Even if you don’t have coding experience, Codex is designed to help beginners turn ideas into working code just by describing what you want. Here are some things you could use Codex to make, based on the examples and guidance in the knowledge sources:

  • Simple Websites: You could ask Codex to create a basic personal webpage, a digital resume, or a landing page for an event.
  • Browser Games: For example, you could prompt Codex to make a tiny game where you click on moving objects to score points—like the “Bug Busters” game described in the sources, which is a single-screen game where you click a bug to earn points and see your score at the end Building Consistent Workflows with Codex CLI & Agents SDK.
  • Automation Scripts: You could ask Codex to write a script that renames files, organizes photos, or sends reminder emails.
  • Creative Projects: Codex can help you generate custom icons, logos, or even simple interactive stories for fun or personal use What’s new with DALL·E 3?.
  • Learning Tools: You could have Codex make a flashcard app to help you study, or a quiz game to test your knowledge on a topic.

The key is that you can describe your idea in plain language, and Codex will do the technical work for you. You don’t need to know how to code—just be clear about what you want, and Codex will help bring it to life Using Codex with your ChatGPT plan.

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If you ever get stuck, you can also ask Codex to explain what it made, so you can learn as you go!

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

opal linden
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@pearl olive could I use it to make a website? As you say? But how does it work cuz won’t I have to pay for it to be uploaded to the web like a site and stuff

pearl oliveBOT
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Let me check the knowledge base for you again. One moment! :books:

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Yes, you can use Codex to make a website! You simply describe what you want (for example, “Make me a landing page for a retro-games store”), and Codex will generate the code for your website. There are even examples showing how you can prompt Codex to create different styles of websites, and it will produce the HTML and other code you need Frontend coding with GPT-5.

However, Codex only creates the website code for you—it does not automatically put your website online. To actually publish your website so others can visit it on the internet, you would need to use a web hosting service, which usually involves a separate cost. Codex helps you build and preview your website on your own computer, but hosting and making it public is a different step that is not included with Codex or your ChatGPT Plus subscription.

In summary:

  • Codex can help you create the website code easily, even if you don’t know how to code.
  • To make your website available on the internet, you would need to pay for web hosting separately.

The knowledge sources do not provide details about web hosting or publishing, but they do confirm that Codex can generate website code for you Frontend coding with GPT-5.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.

opal linden
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@pearl olive would it be able to update information as I apply to it ? Once it’s a website like would it function like a saving of stuff and stuff. Also if I keep it on my pc do I have to get it uploaded to a website to actually interact with it the way it’s intended

pearl oliveBOT
#

Let me check the knowledge base for you again. One moment! :books:

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Codex can generate website code that allows you to update information—such as adding new content or saving data—if you describe those features in your prompt. For example, you could ask Codex to make a website where you can enter and save notes, or update a list of items. However, the way your website “saves” information depends on how the code is written:

  • If the website is just HTML/CSS/JavaScript and you open it on your PC:
    You can interact with it (click buttons, fill forms, etc.), but any data you enter will usually only be saved temporarily in your browser (for example, using local storage). If you refresh or close the page, you might lose your changes unless Codex adds code to save data locally.

  • If you want to save information permanently or across devices:
    You would need a backend (like a server or database), and Codex can help generate code for that too, but you’d need to run it on your computer or host it online. This is a more advanced setup.

  • You do NOT have to upload your website to the internet to interact with it:
    You can open the website files Codex creates directly on your computer and use them. However, if you want others to access your site, or if you want to use features that require a server (like saving data online), you would need to host it on the web, which usually involves a separate cost.

In summary:

  • You can interact with and update your website locally on your PC.
  • Saving data permanently or sharing your site online requires extra steps (like hosting or adding a backend).
  • Codex can help generate the code for these features, but you may need to specify what you want in your prompt and possibly do some setup yourself.
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The knowledge sources confirm Codex can generate interactive websites and help you build and preview them on your computer, but do not provide detailed instructions for advanced saving or hosting features Frontend coding with GPT-5.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

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@opal linden Kapa.ai is still learning and improving, please let me know how I did by reacting below.