Underdog is a personal AI that runs 100% on your computer. It handles email, calendar, meeting notes, dictation and errands without sending your content to a cloud AI service. Its fast model, Woof 4B, runs at about 115 tokens a second on a MacBook Air, and the 27B model scores 33.7 on the Artificial Analysis Intelligence Index. Invite-only beta on Mac, with Windows in beta.