📘 Introduction

GitHub Copilot, Codex, and Claude Code can all help you write and understand code. However, they are built around different workflows, which can make choosing the right tool confusing for beginners.

In this guide, you will learn how the three AI coding tools differ, what each one does particularly well, and which option may fit your daily development workflow.

💡 The short answer

GitHub Copilot is closely integrated with development environments and GitHub. It is especially useful when you want code suggestions, chat, code review, or agentic help without leaving your existing GitHub-centered workflow.

Codex is a coding agent that can work across the Codex app, command line, IDE, and cloud. It is designed for delegating repository tasks such as implementing features, fixing bugs, reviewing changes, and running tests.

Claude Code provides an agentic coding workflow centered on working with your codebase and development tools. Its command-line experience is a major focus, while IDE and desktop experiences are also available.

GitHub Copilot -> IDE and GitHub-centered coding assistance
Codex           -> Coding agent across app, CLI, IDE, and cloud
Claude Code     -> Terminal-first agentic coding workflow

🤖 What is GitHub Copilot?

GitHub Copilot is an AI coding assistant from GitHub. It can suggest code while you type, answer questions in your IDE, review code, and help complete development tasks through agentic features.

Its biggest advantage is how naturally it fits into tools many developers already use, including Visual Studio Code and GitHub. This makes it a practical choice when you want AI assistance directly inside your editor and repository workflow.

🧠 What is Codex?

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