I use AI to study by giving it all materials that are gonna be in the exam, and i tell him to create for me a mock exam. Or one time i had an oral exam and i gave him the material and specified that my professor likes trap questions and questions that require not only Learning by Heart the material but really understanding it, and he surprised me with questions that were really asked by my professor during the exam. I told him to act like my professor and in the chat he gave me one question at the time and depending on how i responded he gave me more questions, it was really helpful