AI Assistant for Work

Codex App

Codex is OpenAI's AI assistant that can read, edit, and run code. It helps you build faster, fix bugs, and understand unfamiliar code. With Codex cloud, it can work on tasks in the background using its own cloud environment.

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Included with Plus, Pro, Business, Edu & Enterprise Background execution for complex tasks
codex-app ~ %
$ codex init my-project
Creating repository: my-project
Connecting to GitHub...
Environment configured
$ codex run "add user auth"
Reading project structure...
Generating auth module...

What is Codex App?

Codex is OpenAI's autonomous AI assistant designed to understand, write, and improve code on your behalf. It runs in a secure cloud environment, connected to your GitHub repositories, and can complete complex engineering tasks end-to-end without manual intervention.

Read & Understand

Codex analyzes your entire codebase — from directory structure to import graphs — building a comprehensive understanding before making any changes.

Write & Edit

From adding new features to refactoring existing code, Codex generates clean, well-structured code that follows your project's conventions.

Run & Validate

Codex executes code in its cloud sandbox, runs tests, and validates that changes work before proposing them back to you.

Background Execution

Delegate tasks that run in the cloud while you stay focused on what matters most. Codex works autonomously and reports back when done.

Key Features

Codex App combines the power of large language models with a secure cloud runtime to autonomously build, debug, and improve your software.

01

Cloud Environment

Codex operates in its own cloud sandbox with full access to install dependencies, run tests, and execute code safely without affecting your local machine.

02

GitHub Integration

Connect your GitHub account and Codex can read repositories, create branches, make commits, and open pull requests with proposed changes.

03

Multi-Surface Access

Use Codex across multiple surfaces — web app, IDE extension, and terminal — all connected by your account. Start a task in one surface, review in another.

04

Prompt Engineering

Write clearer prompts with constraints, context, and the right level of detail. Codex understands complex multi-step instructions and breaks them down.

05

IDE Extension

Delegate tasks directly from your editor. Kick off a cloud task from VS Code or JetBrains, then monitor progress and apply diffs locally.

06

Enterprise Security

Control whether Codex has internet access from its cloud environment. Enterprise workspaces offer admin-managed security policies and governance.

Common Workflows

Start with proven patterns for delegating tasks, reviewing changes, and turning results into production-ready pull requests.

1

Prompt & Delegate

Describe what you need — from "fix this bug" to "build the authentication flow" — and Codex takes it from there. Include relevant context, constraints, and acceptance criteria for best results.

2

Background Execution

Codex works autonomously in the cloud. It reads your codebase, makes changes, runs tests, and iterates until the task is complete — all while you continue working on other things.

3

Review & Iterate

Codex presents changes as clear diffs or pull requests. Review what was changed, run additional checks, request modifications, or merge directly when satisfied.

4

Deploy & Monitor

Once changes are merged, Codex can help with deployment scripts, monitoring setup, and post-deployment validation — closing the loop from development to production.

Codex in Action

See how Codex handles a real-world task — from a natural language prompt to a complete pull request.

codex-task-42 — zsh
$ codex run "add input validation to the signup form"
→ Reading project: nextjs-blog-platform (4.2k files)
→ Found signup component at src/app/auth/signup.tsx
→ Analyzing validation patterns in existing forms...
✓ Created branch: codex/validate-signup-form
✓ Modified: src/app/auth/signup.tsx (+42 lines, -8 lines)
✓ Created: src/lib/validators/signup.ts (+89 lines)
✓ Created: src/__tests__/validators/signup.test.ts (+156 lines)
→ Running tests...
PASS src/__tests__/validators/signup.test.ts
✓ rejects empty email
✓ rejects invalid email format
✓ requires minimum password length (8 chars)
✓ requires uppercase & lowercase in password
✓ accepts valid signup input
✓ Opened PR: #142 — Add input validation to signup form

Setup & Configuration

Getting started with Codex App takes just a few minutes. Configure your environment and start delegating tasks to your AI assistant.

1. Connect GitHub

Go to Codex App and connect your GitHub account. This gives Codex access to read your repositories and create pull requests.

2. Choose Your Plan

Codex is included with your Plus, Pro, Business, Edu, or Enterprise plan. Enterprise workspaces may require admin setup for governance.

3. Configure Environment

Select the repository, specify setup steps, and choose which tools Codex should have access to when running tasks in the cloud.

4. Start Delegating

Tag @codex on issues and pull requests, use the IDE extension, or prompt directly on the Codex App platform to kick off tasks.

Frequently Asked Questions

Everything you need to know about Codex App and its cloud capabilities.

What plans include Codex App?

Codex is included with your Plus, Pro, Business, Edu, or Enterprise plan. Some Enterprise workspaces may require admin setup before you can access Codex App. Check your plan details to confirm availability.

How does Codex handle my code securely?

Codex runs in a secure cloud environment isolated from your local machine. You control whether code can access the public internet from the cloud environment. Enterprise workspaces offer additional security policies, governance controls, and admin-managed configurations.

Can I use Codex from my IDE?

Yes. Codex App offers an IDE extension that lets you kick off cloud tasks directly from your editor. You can monitor progress in real-time and apply the resulting diffs locally. Supports VS Code and JetBrains IDEs.

Can Codex work in the background?

Yes. With Codex cloud, you can delegate tasks that run autonomously in the background. Codex reads your code, makes changes, runs tests, and reports back — all while you continue working on other priorities.

How do I delegate tasks from GitHub?

Simply tag @codex on issues and pull requests. Codex will automatically spin up a cloud task, analyze the context, make changes, and propose a solution directly on the thread. This enables seamless AI collaboration within your existing GitHub workflow.

Can I control internet access for Codex?

Yes. You can configure whether Codex is allowed to reach the public internet from its cloud environment. This is an important security control for enterprises handling sensitive codebases. Internet access can be toggled per workspace or managed globally by admins.

Ready to build faster with Codex?

Start delegating tasks to your AI assistant today. Codex handles the implementation while you focus on the big picture.