Midsize PDF file yields Error 400: "The request's total referenced files bytes are too large to be read"

#### Environment details

- Programming language: Python
- OS: Mac OS 15.3.
- Language runtime version: 3.10
- Package version: v.1.1.0

#### Steps to reproduce

I have a midsize PDF file with 160MB and 127 pages. I can successfully upload the PDF with `client.files.upload(file=pdf_path)`.

However, when I try to use the uploaded file in `client.models.generate_content()` I get this error:

`ClientError: 400 INVALID_ARGUMENT. {'error': {'code': 400, 'message': "The request's total referenced files bytes are too large to be read", 'status': 'INVALID_ARGUMENT'}}`

My code works on the same PDF, when I shorten it to say 10 pages.

How can I fix this error and use the full PDF?

Thanks in advance for any help in this matter.