ChatGBT v document v personal use v free?

I've used ChatGBT on Bing a half dozen times for not simple questions with excellent (verified) results.

I know that a paid Open-AI account allows for GPT-4 to edit/make more concise/more readable a several thousand word submitter produced Word document. I've tried submitting to Edge/Bing/ChatGBT but hit the 2000 character limit (I'm guessing my doc is ~4-6k characters). Am I missing something other than paying for the time at Open-AI?

Mark

OpenAI offers ChatGPT, based on GPT3.5 or GPT4 for subscribers. Microsoft's Bing uses GPT4.

I don't think ChatGBT exists!

However, the maximum number of tokens (words and punctuation marks) that ChatGPT can handle at once is 2048. If the input text exceeds this limit, it can be split into smaller segments and processed separately.

Microsoft says its AI input limit is 2,000 words but it's probably 2048 words and punctuation marks like ChatGPT.

In the meantime I've learned that what I need is MS' Copilot soon to be released.