Comparison

GitHub Copilot vs OpenAI Codex

	GitHub Copilot	OpenAI Codex
What it says it does	GitHub CopilotGitHub Copilot works every step of the way, from an open issue to reviewing and merging a pull request. Use it in your editor, the terminal, on your desktop, and on GitHub.	OpenAI CodexOpenAI's coding agent. Codex works in a desktop app, on the web, in a CLI, in IDE extensions and on iOS, can run tasks in cloud sandboxes, and reviews GitHub pull requests.
Pricing	GitHub CopilotFree plan or free trial mentioned on official site; see official pricing page for current prices. (official)	OpenAI CodexIncluded with ChatGPT plans: Free $0 and Go $8/mo (desktop app, lighter model); Plus $20/mo (web, CLI, IDE, cloud code review); Pro $100, $200 or $500/mo; Business $25/user/mo billed monthly; or pay API rates with an API key (official)
Website	GitHub Copilothttps://github.com/features/copilot	OpenAI Codexhttps://chatgpt.com/codex/

Which tool for which job

GitHub Copilot wins when you want GitHub's own coding agent in VS Code or another listed editor, including a free completion tier.

OpenAI Codex wins when you want one subscription that covers chat and a coding agent across terminal, IDE and cloud.