Tokens limited to 4096 output

I made a form to create long texts, 1200 words long, but when I look at the generated text it only creates about 650 words, that’s about 4000 tokens long.

Is there any possibility to increase those tokens?
I see the maximum is 4096, can we have more control over the generated tokens?

4096 tokens is often the literal limit of the underlying models. They cannot generate more tokens than that. That should be ~3000 words though.