Codex is OpenAI’s coding agent for software development and is included with ChatGPT Plus, Pro, Business, Edu, and Enterprise plans. It can help you:
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Write code: Describe what you want to build, and Codex generates code that matches your intent, adapting to your existing project structure and conventions.
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Understand unfamiliar codebases: Codex can read and explain complex or legacy code, helping you quickly grasp how systems are structured.
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Review code: Codex analyzes code to identify potential bugs, logic errors, and unhandled edge cases.
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Debug and fix problems: When something breaks, Codex helps trace failures, diagnose root causes, and suggest targeted fixes.
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Automate development tasks: Codex can run repetitive workflows such as refactoring, testing, migrations, and setup tasks so you can focus on higher-level engineering work.