OpenAI Codex CLI
New💻 Code & Development
OpenAI's dedicated coding agent with a Rust-based CLI for high-performance execution, sandboxed runtime for safe code experimentation, and async cloud agent capabilities for parallel task processing. It represents OpenAI's vision for an agentic coding experience that goes beyond chat-based assistance to handle complex, multi-file development workflows autonomously.
Getting Started with OpenAI Codex CLI
Step-by-step setup guide
- 1For IDE plugins: search for the tool in VS Code / JetBrains extension marketplace and install.
- 2For cloud tools: visit the website and sign in with GitHub or Google account.
- 3Open a project file — the tool activates automatically. Begin typing to see AI suggestions.
- 4Use shortcuts like Tab to accept suggestions or Ctrl+I (Cmd+I) to open AI chat.
- 5Describe what you need in natural language in the chat panel — the AI generates code or explains existing code.
Key Features
What OpenAI Codex CLI offers
Code Completion
Real-time AI code suggestions as you type. Supports all major languages and frameworks with Tab-to-accept workflow.
AI Chat
Chat with AI in the sidebar or inline panel to ask coding questions, request refactoring, or get debugging help.
Code Explanation
Select code and ask the AI to explain its logic — useful for understanding unfamiliar codebases or complex algorithms.
Bug Detection & Fixing
AI automatically analyzes code for potential bugs, security issues, and performance problems with fix suggestions.
Test Generation
Auto-generate unit tests for selected functions or modules supporting Jest, pytest, JUnit, and other frameworks.
Code Refactoring
Select code and ask the AI to refactor it — optimizing structure, readability, or performance while preserving functionality.