
Codex
: How to use it, features, and the business problems it solves
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What is Codex?
A cloud-based AI software engineering agent developed by OpenAI that autonomously generates, tests, and deploys code from natural language instructions. Connects to GitHub repositories, processes multiple tasks in parallel, and runs and verifies code in a sandboxed browser environment.
Business problems it solves
About "Codex"
How to Use
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Log in to ChatGPT
Subscribe to a ChatGPT Pro, Team, or Enterprise plan and log in to your account.
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Enable Codex
Turn on the "Codex" feature in ChatGPT's settings and select the repositories or projects you want to use.
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Enter a task
Give instructions in natural language, such as "Fix this bug" or "Add a new feature," to assign a task to Codex.
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Codex runs the task
Codex executes the task in a cloud sandbox environment, generating or modifying code, running tests, and more.
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Review the results
Check the code, changes, and test results that Codex produced, and revise or approve them as needed.
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Integrate the code
Merge the reviewed code into your repository and continue your development process.
Features
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Code generation from natural language
Automatically generates and modifies code based on natural-language instructions.
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Bug fixing and code review
Analyzes your existing codebase to identify and fix bugs and suggest improvements.
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Automatic test execution
Automatically runs tests against the generated code to ensure quality.
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Cloud sandbox environment
Each task runs in an isolated cloud environment without affecting other processes.
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Parallel processing of multiple tasks
Runs multiple tasks at once to improve development efficiency.
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Codebase understanding and navigation
Understands the code structure within a repository and locates the right files and functions.
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Security and privacy protection
Your code and data are managed securely, with privacy protected.
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Multi-language support
Supports more than 30 programming languages, including Python, JavaScript, TypeScript, Go, Java, C++, C#, Swift, PHP, and Rust.
Pricing
| ChatGPT Pro ($20/month) | ChatGPT Team ($25/user/month) | ChatGPT Enterprise (contact us) | |
|---|---|---|---|
| Codex access | ○ | ○ | ○ |
| Tasks | Unlimited | Unlimited | Unlimited |
| Sandbox environment | ○ | ○ | ○ |
| Team management | × | ○ | ○ |
| Enhanced security | × | ○ | ○ |
| Support | Standard support | Priority support | Dedicated support |
| Onboarding support | × | × | ○ |
Frequently compared services
Articles featuring Codex
Top 4 AI Coding Tools Compared | Choosing Between Claude Code, Cursor, Codex, and Antigravity
A side-by-side comparison of the leading AI coding tools — Claude Code, Cursor, Codex, and Antigravity. Guides you to the right choice based on features, strengths, and ideal use cases.

[2026 Edition] 20 AI Tools Transforming Developer Workflows | Coding Assistance, Automated Code Review, No-Code Web Development, and Workflow Automation
A curated look at the best AI tools for developers in 2026. Covers 18 tools across coding assistance, automated code review, no-code development, and workflow automation — all aimed at improving productivity.
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