Desktop app - Grein

Grein Desktop is in beta. Get it from Get the desktop beta on grein.studio.

The desktop app runs the full Grein workspace and lets you power the assistant with your own subscription instead of Dia.

Use Claude or ChatGPT

Sign in to Claude Code or Codex on your computer.
In the app, open Agents → Manage agents and choose Dia, Claude, or ChatGPT.
For Claude or ChatGPT, pick a model and reasoning effort in the chat panel.

Requests go through your own account and its limits. The assistant still needs Pro.