AI tool to take pdf as input

I want to create an AI tool which is able to take pdf as input, extract the contents of that pdf and generate suitable output on a given topic.

Are there any libraries or tools I can use. Can anyone help me out with this?

If you want to communicate with files (like: .pdf, .docx, .txt), you can explore OpenAI assistant API, here you will get options

Thank you for the response , I will try that out

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I tried the knowledge retrival with pdf from the tools section but not working .Can you give me steps how can i got about this?