OpenAI Codex vs Claude Code for non-engineers: where each runs and how each asks permission

How do Codex and Claude Code differ for someone who does not write code?

They differ less in what they can do than in where they run and how they ask permission. Both vendors now ship a terminal tool, a desktop app and a cloud mode, so a non-engineer can avoid the terminal in either. OpenAI's Codex CLI page describes the tool as a way to "inspect code, make changes, run commands, and automate repeatable work without leaving your terminal", while Anthropic's overview describes Claude Code as an agentic coding tool "available in your terminal, IDE, desktop app, and browser".

This is a neutral comparison of two vendors' own documentation, as published in November 2026. We do not rank them, and we make no claim about which writes better code. The limit of any such comparison is that both products change often, so treat the table below as a checklist for your own test, not a verdict. The OpenAI Codex CLI docs and the Claude Code overview are the sources.

Where does each tool run?

Each runs in three places: a terminal, a desktop app and a cloud service. The table summarises what each vendor documents.

Question	OpenAI Codex	Claude Code
Terminal	Codex CLI; also scripts via codex exec	Terminal CLI; scripting flags such as --print
Desktop app	ChatGPT desktop app for macOS and Windows, with a Linux guide; choose Codex when sending your first message	Claude Desktop Code tab on macOS, Windows and Linux (beta)
Cloud	Codex Cloud, from ChatGPT on web, mobile or the desktop app	Claude Code in the cloud, from the browser, mobile, Desktop or claude --cloud
Cloud keeps working with the computer asleep	Yes, per OpenAI's cloud page	Yes, per Anthropic's cloud page
Cloud repository host	GitHub repositories chosen during setup	GitHub for clone and pull requests

OpenAI's cloud page says each task has its own workspace and can keep working while your computer is asleep, and that you review changed files and test results before committing or opening a pull request. Anthropic's cloud sessions page says the session keeps running after you close your laptop and that cloning in Anthropic-hosted environments and pull request creation require GitHub.

How does each one ask permission before acting?

Codex and Claude Code both separate what the tool can technically do from when it asks you. OpenAI's approvals and security page names two controls: sandbox mode, which sets what Codex can do technically, such as where it can write and whether it can reach the network, and the approval policy, which sets when it stops to ask.

In the default Auto preset, the page says Codex can read files, make edits and run commands in the working directory automatically, and asks for approval to edit files outside the workspace or to run commands that need network access. The same page says the default workspace-write sandbox keeps network access off unless you enable it, and that on launch Codex checks whether the folder is version-controlled and recommends Auto for version-controlled folders and read-only for folders without version control, and that it may start in read-only until you trust the working directory.

For Claude Code, the Desktop reference places a permission mode selector in the row under the prompt box, and the permissions and safety guide explains the modes. Read both before you let either tool act unattended.

What should a product manager test before choosing?

Run one small, reversible task on each, then compare how much you had to review. OpenAI's Codex CLI page recommends one safety step that works on either tool, a Git checkpoint. It says: "Create Git checkpoints before and after a task so you can revert changes."

A fair two-week test has three parts:

• The same task on both, such as turning a folder of notes into a one-page brief.
• The same approval setting on both, starting at the strictest.
• A written count of how many times you had to correct or reject output.

Claude Code reads CLAUDE.md, and Anthropic's overview says it can read an existing AGENTS.md in place of a CLAUDE.md. For how Codex uses AGENTS.md, see the AGENTS.md guide.

Which should you start with?

Start with the one whose surface you will actually open. If your team already works in the ChatGPT desktop app, the Codex guide for product managers is the shorter path. If you prefer a dedicated Code tab and a permission selector, the comparison of Claude Code on desktop, web and terminal covers your options. For a third option, see the Cursor and Claude Code comparison.