DEV·07 · Coding & App Builders

OpenAI Codex

OpenAI's software engineering agent that writes features, fixes bugs and proposes pull requests, available in ChatGPT, a CLI and IDE extensions.

PricingPaid

CategoryCoding & App Builders

Last checkedNov 2026

What is OpenAI Codex?

Codex is OpenAI's coding agent. You can assign it tasks from ChatGPT, where it works in a cloud sandbox connected to your repository, or use it locally through a command-line tool and editor extensions.

It can work on several tasks in parallel and propose pull requests. Usage is included in ChatGPT paid plans with limits.

Key features

Cloud tasksWork runs in a sandbox with your repo.

Parallel workAssign several tasks at once.

CLI and IDEUse locally in the terminal or editor.

Pull requestsProposes changes for review.

How to get started

Open Codex from ChatGPT and connect a GitHub repository.
Assign a small bug fix.
Review the proposed changes before merging.

Our take

A strong agent for delegating coding work, especially for ChatGPT users.

Best for

Delegating coding tasks
Bug fixes and refactors
Teams using ChatGPT

Strengths

Runs tasks in parallel in the cloud
Included in ChatGPT paid plans

Limits

Needs a paid plan
Results require review

Visit OpenAI Codex ↗

Questions

Is OpenAI Codex free?

No. OpenAI Codex requires a paid subscription. Check the official website for current plans.

What is OpenAI Codex best for?

OpenAI Codex is best for: Delegating coding tasks, Bug fixes and refactors, and Teams using ChatGPT.

What are the best alternatives to OpenAI Codex?

Popular alternatives in Coding & App Builders include GitHub Copilot, Cursor, Replit, Lovable, and Bolt.new.

Pricing and features change often. Confirm details on the official OpenAI Codex website.