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OpenAI Codex CLI

OpenAI's open-source AI coding agent for the terminal

⭐ Top Quality🏆 Best Value🔓 Open Source

Code & Development Free ★★★★☆ 4.4/5 WEB, API

code terminal CLI open-source

Codex CLI is OpenAI's open-source coding agent for the terminal. Features multi-agent parallel execution, @codex in GitHub PRs, image input, MCP support, and Codex Cloud for hosted execution.

OpenAI Codex CLI is an artificial intelligence tool in the Code & Development category, developed by OpenAI and launched in 2025. Codex CLI is OpenAI's open-source coding agent for the terminal. Features multi-agent parallel execution, @codex in GitHub PRs, image input, MCP support, and Codex Cloud for hosted execution. Key features include: Full-screen terminal UI, Multi-agent parallel execution, MCP support, Built-in code review, Image input (screenshots, wireframes), AGENTS.md. The tool is available on web, api with a free pricing model.

🔗 Visit OpenAI Codex CLI 📂 See all Code & Development tools

💰 Pricing

Free — Free (open-source) · Via OpenAI API or ChatGPT Pro/Plus subscription

✨ Features

Full-screen terminal UI

Multi-agent parallel execution

MCP support

Built-in code review

Image input (screenshots, wireframes)

AGENTS.md

Persistent sessions

Built-in web search

Codex Cloud

@codex in GitHub PRs

🎯 Use Cases

CLI development
Refactoring
Debug
Dev automation

⚖️ Pros & Cons

👍 Pros

Open-source with OpenAI's backing — the most powerful free AI coding agent
@codex in GitHub PRs enables AI-assisted code review directly in your workflow
Multi-agent parallel execution handles complex refactoring across files
Image input accepts screenshots and wireframes as coding context
Codex Cloud provides hosted execution without local setup

👎 Cons

Tied to OpenAI ecosystem — no Claude or Gemini model support
Terminal-only interface — not for visual-first developers
API costs can be significant for intensive use

🏆 Verdict

Codex CLI is OpenAI's answer to Claude Code — open-source, powerful, and deeply integrated with GitHub. The @codex PR feature and multi-agent parallel execution are standout capabilities. The OpenAI lock-in is the main trade-off.

In summary, OpenAI Codex CLI stands out in the code & development AI landscape thanks to its strengths: open-source with openai's backing — the most powerful free ai coding agent, @codex in github prs enables ai-assisted code review directly in your workflow, multi-agent parallel execution handles complex refactoring across files. However, some users note: tied to openai ecosystem — no claude or gemini model support, terminal-only interface — not for visual-first developers. If you're looking for alternatives, you can compare OpenAI Codex CLI with GitHub Copilot, Cursor, Windsurf. Our overall rating: 4.4/5.

ℹ️ Information

Company	OpenAI
Launched	2025
Platforms	WEB, API
Category	Code & Development
Site	https://openai.com/codex/

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❓ Frequently Asked Questions

What is OpenAI Codex CLI?

OpenAI Codex CLI is openAI's open-source AI coding agent for the terminal. Codex CLI is OpenAI's open-source coding agent for the terminal. Features multi-agent parallel execution, @codex in GitHub PRs, image input, MCP support, and Codex Cloud for hosted execution.

Is OpenAI Codex CLI free?

The pricing model for OpenAI Codex CLI is: free. Free (open-source) · Via OpenAI API or ChatGPT Pro/Plus subscription

What are the alternatives to OpenAI Codex CLI?

What are the alternatives to OpenAI Codex CLI : GitHub Copilot, Cursor, Windsurf.