Not so far. Reading pdf is probably not working great right now, but it works well enough for many cases and definitely will be improved.

I think the main problem right now is that LLM's memory is short, so to actually learn a full textbook, it has to be fine-tuned on it. It is inconvenient and expensive, but I am pretty sure it is possible to make it much better.

I would say we will see something like this in 3 years or less.