Claude Code vs. Codex: Why I use both and how to choose one (if you must) ...

OpenAI’s integration of ChatGPT 5.5 and its Codex platform combines advanced language processing with autonomous coding capabilities to create a versatile system for tackling a wide range of tasks.

OpenAI has added plugin support to its agentic coding app Codex in an apparent attempt to match similar features offered by competitors Anthropic (in Claude Code) and Google (in Gemini’s command line ...