codee3.dev/compare/codex-app

Codee3 vs the Codex app

Both run coding agents on your projects, several at a time. They differ in which agents they run, where they run, and what keeps the agents in step.

Codee3Windows IDE · your own agents

Codex appIn the ChatGPT desktop app · OpenAI models

THE SHORT ANSWERchecked 2026-10-21

The Codex app is now part of OpenAI’s ChatGPT desktop app. It runs Codex on OpenAI’s models, on macOS and Windows with Linux in preview, with a ChatGPT plan or an API key. Codee3 is a Windows IDE that runs your own Codex beside Claude Code and Gemini CLI. Pick the Codex app for Codex alone. Pick Codee3 to run several agents on your own plans.

CODEE3 · YOUR OWN ACCOUNTS

YouCodee3Your Claude planYour ChatGPT planYour Google AI plan

You pay each AI company directly. Codee3 charges only for the IDE.

CODEX APP · OPENAI MODELS

YouChatGPT appOpenAI models

You pay OpenAI, through ChatGPT or the API, and the app runs Codex.

CODEE3CODEX APP

Runs onWindows 10 and 11 today. macOS and Linux later.macOS and Windows (Microsoft Store). Linux in preview.

Which agentsCodex, Claude Code and Gemini CLI, side by side.Codex, on OpenAI’s models.

Who supplies the AIYou do, on the ChatGPT, Claude or Google AI plan you already have.Your ChatGPT plan, or an OpenAI API key.

Several agents on one projectFree: agent chats beside your code. Founder: an orchestrator plans the jobs and hands them to helpers, each in its own safe copy.Several chats in one project, each in its own Git worktree.

Decisions agents followA project brain every agent reads. Founder adds guards that stop changes that break a decision.AGENTS.md files you write. Local memories, off by default.

Questions waiting on youA Needs you rail in every tier. Founder adds the orchestrator’s questions to it.A Scheduled view, which its docs call your inbox, for automation runs.

Review and mergeEvery tier: review an agent’s finished work, then land it in one step, with a checkpoint to undo it.A review pane for your Git changes: stage, commit, and review pull requests.

Work on a scheduleNot yet. Coming to Founder.Automations that run on a schedule, unattended.

Where sessions runOn your computer.On your computer, or as cloud tasks.

PriceFree for two projects open at a time. Founder US$149 a year.Included with a ChatGPT plan. See learn.chatgpt.com/docs/pricing.

Codex app facts checked on 2026-10-21 against its changelog, the quickstart, the worktrees docs, the models page, the Linux page, the memories docs, the automations docs and the pricing page. Something out of date? Tell us and we'll fix it.

WHERE IT RUNSCODEE3CODEX APP

WindowsTodayToday

macOSLaterToday

LinuxLaterPreview

Codex app suits you if

you mostly use Codex and ChatGPT, you want cloud tasks and automations that run on a schedule, or you work on a Mac or Linux.

Codee3 suits you if

you work on Windows and want Codex beside Claude Code or Gemini CLI, on your own plans, all reading one project brain. With Founder, an orchestrator hands the jobs to helpers, each in its own safe copy.

Switching

Can I use Codex and Claude Code together?

Yes. Codee3 runs the Codex command-line tool on your own ChatGPT sign-in, beside Claude Code and Gemini CLI, and Codex reads your AGENTS.md files as it does anywhere. Your files and git history don’t change, and the ChatGPT app can stay installed.

01Install Codee3 next to the ChatGPT appBoth can stay installed.
02Install the Codex command-line toolCodee3 runs it, signed in with the ChatGPT plan you already pay for.
03Open the same folderNothing is converted or moved. Add Claude Code or Gemini CLI when you want them.

Questions

What people ask before they choose.

Can I use my ChatGPT plan in Codee3?

Yes, through Codex signed in with your own account. Codee3 never sees your sign-in, and does not provide or resell any AI usage.

Is the Codex app available on Windows?

Yes. It is part of the ChatGPT desktop app, which installs on Windows from the Microsoft Store (OpenAI’s docs, checked 2026-10-21). Codee3 is a separate Windows IDE that runs the Codex command-line tool.

What happened to the Codex app?

OpenAI’s changelog says that on 9 July 2026 Codex became part of the ChatGPT desktop app on macOS and Windows, and existing Codex app users kept their projects and settings.

Can the Codex app run Claude Code or Gemini CLI?

Its models page lists OpenAI’s models, and other providers only through a compatible Responses API endpoint. We found no OpenAI page that says it runs Claude Code or Gemini CLI (checked 2026-10-21).

Do Codex and Claude Code share one instructions file?

Not on their own: Codex reads AGENTS.md and Claude Code reads CLAUDE.md. In Codee3 every agent reads the same project brain, so your decisions live in one place rather than in two files you keep in step.

Is Codee3 an alternative to the Codex app?

On Windows, yes, if you want more than Codex: it runs Codex beside Claude Code and Gemini CLI. It runs Codex itself, so it can also sit next to the ChatGPT app rather than replace it.

What does Codee3 cost on top of my AI plan?

Nothing for up to two projects open at a time. Founder is US$149 a year for unlimited projects and the orchestration. Your AI usage stays with your own plan.

See for yourself

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Try Codee3 on a project you already have.Free for two projects open at a time, on your own Claude Code, Codex or Gemini CLI.Download for Windows