IIRC the ChatGPT paper actually says the verbosity is an unintended effect of the human raters preferring longer/more detailed answers.
Long answers from GPT are unusually obnoxious because of a way the decoder works; it emits words with a much more constant rate of perplexity than human text does (this is how GPT-vs-human detectors work) which makes it sound stuffy and monotone.
Long answers from GPT are unusually obnoxious because of a way the decoder works; it emits words with a much more constant rate of perplexity than human text does (this is how GPT-vs-human detectors work) which makes it sound stuffy and monotone.