AI Exam Prep Tools: Improve reliability, context retention, and prevent hallucination

I am a newcomer to AI, but I have a need for a reliable AI. I've tried Gemini and ChatGPT (I know, probably the wading pool of AI - but that's how new I am to this), but I find they are terribly unreliable. I need to use them for two important functions: to read off my physical therapy exercises straight from a list; and quizzing me on flashcards or other information I need for an upcoming board exam. I need them to be very accurate for both of these (i.e., read to me only what we've created/written/stored, and stop going "off script.") My main problems are that they will forget they can access information they've created (today Gemini can't see numerous notes he created in Google Keep, despite the Connected Apps being toggled "on"; and, ChatGPT not recognizing a note I can see in his memory). Another problem I have is they both are inventing information that isn't there (today Gemini wanted to give me brand new exercises that are not appropriate, despite me repeatedly telling him to anchor to my Keep note and only read me those exercises). This could be very damaging for both of my main purposes. Gemini used to be fairly reliable in these two tasks; but for the last 2-3 weeks, he totally sucks. Are there any AIs suitable for a newbie that can help me, that I can trust? Also, if there is another subreddit I should ask this in, please let me know. And thank you ! (This will be crossposted to 1-2 other subs in case I'm in the wrong place)