Codex vs Claude Code: which AI coding agent fits your stack?
Two AI coding agents are now competing for the same spot in your terminal: Codex from OpenAI and Claude Code from Anthropic. Both read your project, edit files, and run commands on your behalf. The differences come down to where each one lives and how much autonomy you hand it.
Codex
Codex is OpenAI’s agent. It ships with ChatGPT plans and offers two modes: an open-source command-line tool and a cloud mode. You ask for a plan in the chat, then use a permissions setting to decide when it can edit files or run commands without checking back in with you.
Claude Code
Claude Code is Anthropic’s agent, built on Claude models. It runs in your terminal, editor, desktop app, and browser, giving it more surface area than Codex in terms of where you can invoke it. The multi-environment reach is the headline differentiator here.
How to Choose
If you’re already on a ChatGPT plan, Codex costs nothing extra to try. If you’re deeper in the Anthropic ecosystem or want an agent that works across VS Code, JetBrains, Cursor, and a browser tab in the same session, Claude Code has the wider footprint. Neither is a clear winner for every workflow, and the source article notes that the right choice depends on your specific work context.
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