Question:

What is Codex?

Codex is OpenAI’s terminal-based coding tool. It’s OpenAI’s version of Claude Code.

You interact with Codex by describing what you want in plain English. For example, you could say “Hey Codex, implement dark mode” and it will read your code, figure out what needs to change, and make the edits.

Codex can:

  • Read and understand your entire codebase
  • Make changes across multiple files
  • Run terminal commands
  • Review changes before applying them
  • Use different AI models (like GPT-4)

Codex is similar to other AI coding assistants like GitHub Copilot (which works in your code editor) and Cursor (which is a full AI-powered editor).

The main difference between Codex and tools like GitHub Copilot is where they run. Copilot suggests code as you type in your editor. Codex runs in the terminal and can make larger changes across your whole project.

I’ve tried both Codex and Claude Code and I prefer Claude Code but I’ve seen some claims online that Codex is better.

#facts #ai
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