OpenAI Blog2026年4月23日

What is Codex?

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What is Codex? | OpenAI

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April 23, 2026

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What is Codex?

Understand what Codex is and how it fits into your work

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Codex is an AI agent that you can delegate real work to.

ChatGPT is great for asking questions, brainstorming, and drafting in conversation. Codex is designed for a different kind of task—it can work across files, tools, and repeatable workflows to help move work forward.

A simple way to think about it: ChatGPT helps you think through the work, while Codex helps you hand off parts of the work itself.

You don’t need to be a developer or working on software to use Codex. It goes beyond coding and is especially useful for tasks that require more than a single answer—like gathering information from multiple sources, creating and updating files, or producing outputs such as documents, slides, and spreadsheets. Codex can connect to tools, take action, and help you get things done.

For example, you might ask Codex to:

Pull information from your emails, Slack, notes, and dashboards
Make a slide deck from source materials
Create a digital assistant to organize your day
Build a simple dashboard
Create a working app or landing page
Fix a broken workflow
Update a set of files
Automate a mundane task

Codex is not a replacement for your judgment. Think of it like an eager, capable assistant on their first day: fast, helpful, and able to get a lot done, but still needing your direction on what matters most and your review before the work is final.

A simple way to think about it: