How to Process Large data in prompt?

I am using GPT4 32K model , But I want to generate code documentation for very large code files which is having more than 1 M tokens in it , how to create a document for that using GPT4-32K model ?

For starters, you should probably not use GPT-4-32k as it is very expensive. Instead, it would be best if you started out by switching to GPT-4-Turbo.

GPT-4-Turbo can handle 128,000 tokens for context, so what I would do is only feed it sections of the code at a time, like one document, instead of trying to throw all of it at once, as there is currently no model that can use millions of tokens for context.