Codex CLI

Codex CLI is a terminal-native AI coding assistant released by OpenAI. It allows developers to interact with their local codebase using natural language commands, enabling tasks such as refactoring, debugging, and test generation without leaving the command line.

Key features include:

• Local Execution: Runs locally with secure sandboxing for file edits and shell commands.
• Multimodal Support: Capable of interpreting screenshots and technical diagrams to generate code.
• Agentic Capabilities: Powered by GPT-5.2-Codex and o4-mini, it supports long-horizon reasoning and autonomous multi-step tasks.
• Integration: Seamlessly integrates with GitHub and other workflows, available to ChatGPT Plus/Pro subscribers.