3 AIs that I use in my studying workflow (free)

In this video, I share the 3 AIs that I use in my studying workflow. I also share an honorable mention at the end. This video aims to be a discussion video, where I share my views and you also share yours in the comment section below, so that we could learn from each other and move forwards.
links:
Chat GPT: chat.openai.com/
Gemini: gemini.google.com/app
perplexity AI: www.perplexity.ai/
typeset.io: typeset.io/
contents:
0:00 - introduction
0:40 - 1st AI
1:20 - 2nd AI
2:46 - 3rd AI
4:34 - honorable mention