OpenAI launches Codex CLI for terminal-based coding agents
OpenAI has released Codex CLI, an open-source command-line tool that enables developers to run AI-powered coding agents directly from the terminal. The tool competes with existing solutions like Claude Code and Cursor, but offers a lightweight, terminal-native experience.
Key features include multi-file editing capabilities, automatic test execution after code changes, git integration for creating commits and pull requests, and support for multiple AI models. The tool is built on the Agent Client Protocol (ACP) standard, making it compatible with various AI backends.
For developers who prefer terminal-based workflows, Codex CLI offers a compelling alternative to GUI-heavy IDE integrations. The open-source nature also means it can be extended and customized for specific development workflows.
OpenAI's Codex CLI entering the terminal-native coding agent space puts it in direct competition with Anthropic's Claude Code. The open-source approach and ACP compatibility are smart differentiators — but the real battle will be won on model quality and developer trust, not tooling alone.
How does Codex CLI compare to Claude Code?
Codex CLI is open-source and terminal-native, while Claude Code is Anthropic's proprietary tool. Both support multi-file editing and test execution. Codex CLI supports multiple AI backends via ACP, while Claude Code is tied to Anthropic's models. Choice depends on your preferred AI model and workflow.