chatgpt loses track of long documents halfway through

uploading a 60 page report and asking questions about it. first few answers are fine, then it starts quoting sections that aren't in the file. is there a size limit, or a better way to feed it big docs?
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alex_gadget Nov 06, 2026
harry_3
upload the file instead of pasting it. it handles an attached document differently from a huge block of text in the chat, and you can go back and ask about one part later. also ask it to quote the exact sentence it's going on when it answers. if it can't quote it, it's guessing, and you know to look at that bit yourself.
asha_37 Oct 14, 2026
harry_3
it can only hold so much text in mind at once, and in a long chat the early parts are the first thing to get fuzzy. what works for me is working through it in chunks. paste or upload one section, get it to write a short summary, then move on. when it starts drifting, open a new chat and paste the summaries in first. also tell it exactly which section you're asking about, quoting a heading helps a lot.