PSA: past a certain length, ChatGPT doesn't read your PDF, it searches it, and never tells you which one happened
Upload a short file and ChatGPT reads all of it. Upload a long one, a contract, a thesis, a 200 page report, and most of it goes into a search index instead. Every answer is then built from whichever chunks match the words in your question. Nothing in the interface tells you which of the two happen…
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Timeline · 1 report
- 2026-09-22 10:26 · r/ChatGPT
PSA: past a certain length, ChatGPT doesn't read your PDF, it searches it, and never tells you which one happened
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