Mr. Meeseeks

One button. Endless possibilities.

Need a Meeseeks?

Press the red button. He’ll take it from here.
Sound plays when you summon.

For Claude and Codex users

Push the button. Mr. Meeseeks gets it done.

One chat that remembers all your work, across Claude and Codex. Tell him the task and he gets it done. He keeps the project in memory instead of resending it, so every turn sends fewer tokens and your plan goes further.

Get Mr. Meeseeks Watch the demo

Watch the demo

Give Mr. Meeseeks one task, watch him split up the work, and inspect what each Meeseeks is doing. Watch on YouTube.

How it works

  1. Get the app. Sign in with the Claude Code or Codex you already use.
  2. Push the button. Tell Mr. Meeseeks the task in plain words. He gets it done, then poofs.
  3. Come back anytime. He remembers the project, so the next task picks up where the last one ended.

Why summon a Meeseeks?

  • Your plan goes further. He sends a short memory of the project instead of the whole chat history, so each turn uses fewer tokens.
  • Switch without starting over. Hit a limit? Move from Claude to Codex, or to another account. Bring your old Claude, ChatGPT and Codex chats into the same memory, and he still knows what you decided.
  • Lots of hands, one button. Hand off several tasks at once. Each Meeseeks works on its own copy of the project and reports back to one summary, so you are never buried in updates.

He remembers better, too

On a 310-question LoCoMo memory benchmark, answering with Sonnet 5.5, Mr. Meeseeks got 93.9% right; Mem0 got 84.5%. This is the default memory, with nothing tuned for the test. See every result, including where we are weaker.

Your memory stays yours

Your chats, memory and project files live in files on your computer, not on our servers. If you use our hosted summaries, only the excerpts each request needs pass through to the model provider. Read the Privacy Policy.

Ready to summon?

Mr. Meeseeks is a desktop app for Mac and Windows that works with the Claude Code or Codex you already have.

Get Mr. Meeseeks

  • The Mac app is signed and notarized.
  • The Windows app is signed by Metatheory Inc.
  • Bring your ChatGPT and claude.ai history with the Mr. Meeseeks chat importer from the Chrome Web Store.

Developer preview: for Metatheory employees for now. Sign in with your Metatheory Google Workspace account to download.