Question 1

How does ChatPDF apps work?

Accepted Answer

It involves two steps: document ingestion and similarity search.

During ingestion, relevant documents are provided to the model as
    training data. In similarity search, the model compares the user's query
    with the learned representation of the documents to retrieve relevant
    information.

This enables the model to generate more informed responses by
    incorporating external knowledge.

Question 2

Can I use ChatPDF with a multiple PDFs?

Accepted Answer

With PDF Pals, yes. Simply select your PDFs and then choose to open with PDF Pals. Read more: https://pdfpals.com/changelogs/v1.1#chat-with-multiple-pdfs

Question 3

Can I use ChatPDF with scanned PDFs?

Accepted Answer

Yes, PDF Pals employs Optical Character Recognition (OCR) technology to enhance its understanding and processing of scanned PDF documents.

Question 4

Can I communicate in a different language other than English?

Accepted Answer

Absolutely. You are free to switch the output language at any point
    during the conversation. As a default setting, PDF Pal will always
    respond in the same language as your questions.

Question 5

Can I use GPT-4?

Accepted Answer

Yes, as long as your API key has GPT-4 access.

Alternatively, you can sign up for an account at https://openrouter.ai and enjoy using multiple models, including GPT-4, GPT-4 32K and Anthropic Claude v2

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