Best AI study buddy?

Currently looking for an AI that will help me in medical school. I currently use Claude which has been great at explaining concepts but I find it struggles to give "high yield" information and hallucinates. I am drawn to ChatGPT due to voice mode however which would be great if I can ask questions outloud without having to switch tabs and type information out.

Ideally the AI would be

  • as up to date as possible

  • "hallucinates" the least (only facts)

  • can google the internet

  • good at summarising and explaining concepts

  • can store instructions

Out of ChatGPT, Claude and Gemini, which would be the best suited for me? Unfortunately local models are not possible as I don't have the hardware.