OpenAI's Codex CLI: A Local AI Coding Agent

OpenAI launched Codex CLI, a local coding agent running from your terminal. Connecting OpenAI's models (including the new o3 and o4-mini) to local code and tasks, Codex CLI allows AI to write, edit code, and perform actions like moving files. This represents a step towards OpenAI's vision of an 'agentic software engineer'. Open source and lightweight, Codex CLI is supported by a $1 million API grant program for software development projects. While AI coding tools have inherent risks, Codex CLI offers a new approach to AI-assisted programming.