Your Power BI model is a slow mess. Your admin wants to talk to you about the capacity. Bad schema, DAX held together with duct tape, M code nobody touches, and DAX columns that never should have existed. Copilot can help. But which one? We'll map Copilot 365, Copilot for Power BI, and GitHub Copilot to the problems each actually solves, how to get the best results out of each, and how to use these tools to sharpen your modeling instincts, without letting the AI do your thinking for you.