With Google's 1 million token and Sonnet 3.5's 200,000 token limit, is there any advantage of using this over just uploading the pdf files and ask questions abo

With Google's 1 million token and Sonnet 3.5's 200,000 token limit, is there any advantage of using this over just uploading the pdf files and ask questions about it. I was under the impression that you will get more accurate results by adding the data in chat.