Similar situation here

• I went through this last year and finaly found a combo that works well and saves money. I was paying for way too many tools but these are great:
• Google NotebookLM is free and handles huge PDFs easy cuz the context window is massive
• ChatGPT Plus for $20/month has great technical accuracy!! Saved me hundreds and I am very satisfied with the breakdowns. Have you checked out the source citations in NotebookLM yet?

Ok so I totally feel u on the character limit struggle. I remember when I first started using these tools for my massive research docs like 3 years ago... it was honestly a mess cuz the AI would just "forget" the beginning of the book by the time it got to chapter 10. I once spent all night summarizing a manual only to realize the AI had hallucinated half the technical definitions. Lesson learned: context window is EVERYTHING for safety and reliability, especially when your grades are on the line. Curious about one thing: are these textbooks super heavy on math and charts, or is it mostly just long-form text?? That actually changes which tool is "safer" to use so you dont get wrong info or weirdly interpreted data. Anyway, I have been really satisfied with these budget-friendly setups over the years:

• Google NotebookLM is literally free and handles up to 500,000 words, which is perfect for 500-page PDFs. No complaints here, it works well.
• Claude Pro for $20/month is what I use when I NEED to make sure technical terms are 100% spot on... it feels much more reliable than others for complex stuff.
• ChatGPT Plus ($20/month) is fine, but i think Claude 3.5 Sonnet is just better for nuanced chapter breakdowns. Basically, if youre on a budget, start with the free one. But yeah, let me know about the charts/math situation and I can give more specific advice on the reliability side... safety first when it comes to studying!! gl!

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oh man, textbooks are huge, so context is key. In my experience, Claude 3.5 Sonnet handles 500-page PDFs and doesnt miss technical definitions tho.

sooo basically I've tested many tools but what's ur budget? are u looking for freebies or can u swing a monthly sub?? also do u need OCR for charts too??

Good to know!

Been using these for a long time now and they really changed how I study. Dealing with 500 pages is rough but these tools have been pretty reliable for me.

• Perplexity AI Pro is my go-to because it lets you upload huge files and use the Pro Search feature. It handles technical context across hundreds of pages without losing the plot halfway through.
• Humata AI is a really decent option if you need to pull definitions from specific chapters. Since it is built for research papers, it doesnt hit those annoying character limits as easily as basic AI tools do. The secret is basically how these tools index the text. They dont just read it once; they create a map of the whole book so the AI can jump to the right section for every answer. It keeps things factual and keeps the hallucinations down. If you run into issues with file sizes, just let me know and I can show you some workarounds.