Which AI is the best for helping me study?

Now, I know this may seem like a dumb question. ''Why would I want AI to help my studies?''

I failed at the first university entrance exams I took. And now, I will study for a year again and try to enter a university.

And when I study, I obviously cant solve every question correctly. And whenever I look at the video solutions of those questions, it doesnt help me at all mostly. Sometimes the teachers skip the important details to finish that video as quickly as possible, sometimes their mics barely work or they are too loud, sometimes they dont even bother to explain at all.

So, I started using AI for it last year. I tried both GPT and Gemini so far and I concluded that Gemini just solved it better. It is my personal opinion, I might be wrong too, I dont know.

And so, I got the paid subscribtion for it.

But those prices are expensive in my country. And I can really use only one AI. And now that everyone is saying Gemini is just getting worse, Im worried.

I would appreciate any advices or opinions.