Best way to interact with PDF 2025

Hello,

It’s really crazy that ChatGPT (or even DeepSeek) can’t read a simple PDF. I have an example:

I only asked how many times the word “TESLA” or “Tesla” or “Tesla.” appears in the file and sometimes it says 13…

The issue is that I have large PDFs, and I want it to give me, for example, the most trending companies (the most mentioned ones). But it can’t count words properly—it gives a different result every time.

Do you think it’s better to use another technique or another format?

Thanks!