Depends on model tuning. Basically, you can tune a model to hallucinate less, or to write more human-like, but not really both at the same time, at least not for a model you could expect most users to run locally. For this sort of application (summarizing text), you'd tune heavily against hallucination, because ideally your bullet points are going to mostly be made up of direct paraphrase of article text, with a very limited need for fluid writing or anything even vaguely creative.