Shameless plug but I made a similar tool called asXiv[1] which allows you to "ask" arXiv.org papers questions.
It also recommends questions on initial load that can help understand or explore the paper, here's a demo[2] from the popular Attention Is All You Need paper.
The code is all opensource[3], it uses the google 2.5 flash lite model to keep costs down (it's completely free atm), but that can be changed via env var if you run it locally.
replies(5):