OpenAI Codex

What is OpenAI Codex?

OpenAI Codex is a coding agent described in OpenAI's documentation as "terminal-native" — it runs directly in the command line or as a cloud agent. The tool is bundled with ChatGPT Plus and Pro subscriptions as well as the OpenAI API. Its core function is to assist with coding tasks through natural language prompts or by interacting with the terminal environment. The public GitHub repository for Codex has accumulated 101,880 stars, indicating broad developer interest. The documentation does not detail specific automation or execution capabilities beyond being a coding agent that operates in a terminal context.

Who is OpenAI Codex for?

From the product description and bundling, Codex targets developers who work in terminal environments and want AI assistance for coding tasks without leaving the command line. Because it is also available as a cloud agent, users who prefer not to run local installations can access the same functionality remotely. By being bundled with ChatGPT Plus and Pro, Codex reaches a wider audience of ChatGPT subscribers who may not have previously used a dedicated coding agent. The API bundling suggests it is intended for integration into other tools and workflows, making it relevant for teams building custom coding assistants or automation pipelines.

How much does OpenAI Codex cost?

OpenAI Codex follows a freemium pricing model. The pricing page lists a starting price of $20 per month for the ChatGPT Plus subscription, which includes access to Codex. ChatGPT Pro, a higher-tier plan, also bundles the tool. API usage may involve separate metered costs, though the documentation does not specify rates. The freemium approach means basic or limited access may be available without payment, but the publicly stated starting point for the bundled subscription is $20 per month. No other pricing tiers or usage limits are described in the available data.