Give it as much info as you can based on the token limit, and ask it to summarise the info into bullet points, keep doing this until you have bullet points for the entire document that doesn't exceed 3k tokens, give it this summary and ask it for the info you need

Taken directly from gpt "you can also provide a summary of the information"

AGI? Depends on your definition of AGI. If AGI to you means human level cognitive abilities in every genre, emotions, consciousness, will and objectives of its own, ability to plan and reason, then no, it's not AGI. If your definition of AGI is broader, an agent that can learn something and then generalise that ability to a different or many different domains, then yes I think ChatGPT is AGI. However I caveat this by saying this is not what most people mean when they say AGI.