OPENAI GPT-4 response length limit

I am writing prompt for generating blog using gpt-4, ant it always returns around 700 words long response.

Followings are prompts I tried.

Write a 2000 words long blog about ...

Length: 2000 words

Response characters 8000 characters

I have prompt saying prompt at the end Write _THE_END_ at the end of the repsonse

and let my python script check for the keyword _THEEND before sending continue prompt to again.

Please help me with the prompt that will actually generate 2000+ words response.

I expect output from gpt-4 to be a 2000+ words long. but it’s always around 700 words long