AI Basics Beginner

What's the Difference Between ChatGPT and Codex?

ChatGPT is a general AI helper you talk to; Codex is a coding helper for building software.

Download the poster

ChatGPT and Codex are both AI helpers, but they're built for different jobs. ChatGPT is a general helper you talk to; Codex is a coding helper for building software.

What is ChatGPT? ChatGPT is an AI helper you can talk to. It can answer questions, explain ideas, help you write, brainstorm, and help you learn.

What is Codex? Codex is a coding helper for building software. It helps with code, files, commands, fixing bugs, and programming tasks.

Think of it like this. ChatGPT is a helper for many kinds of thinking and talking. Codex is a helper for coding projects and software work. Same family, different specialty.

What can each one do? ChatGPT can explain how volcanoes work, write a funny story, or summarize a long idea. Codex can make a simple game, fix a bug in the code, or organize code files and folders.

When would you use each one? Use ChatGPT when you want to ask questions, learn, plan, or write. Use Codex when you're working on a coding project, like writing code, fixing it, running commands, or managing files.

Here's an example. You might ask ChatGPT, "Explain planets!" And you might ask Codex, "Help me fix my Python bug!"

Remember: ChatGPT is a general AI helper, and Codex is a coding helper. Same big idea, pointed at different work.

What to remember

  • ChatGPT is a general AI helper you can talk to.
  • Codex is a coding helper for building software.
  • ChatGPT is for many kinds of thinking and talking.
  • Codex is for coding projects and software work.

Words to know

ChatGPT
A general AI assistant you chat with.
Codex
An AI helper focused on writing and fixing code.
Code
The instructions that make software work.
AI assistant
A program that helps by answering and doing tasks.

For grown-ups

ChatGPT and Codex are both AI assistants from OpenAI, but they're tuned for different jobs. ChatGPT is a general-purpose conversational assistant — questions, explanations, brainstorming, writing. Codex is specialized for software engineering: reading a codebase, writing and editing code, running commands, fixing bugs, and managing files. Think general assistant versus coding agent. The same underlying idea (a large language model) is pointed at two different kinds of work.

Want the full story? These go deeper: