The ChatGPT app requires a subscription, and offers no "Large Action Model" behavior (i.e. API tie-in to perform actions on other apps like Spotify/Doordash/Uber/Midjourney). The former is a nice bonus (10 months of ChatGPT $20 sub = one time purchase price of Rabbit R1), the latter has the potential in its fully realized form to make Rabbit infinitely more useful as an assistant.