Yes and no. The hallucination rate shown there is the percentage of time the model answers incorrectly when it should have instead admitted to not knowing the answer. Most models score very poorly on this, with a few exceptions, because they nearly always try to answer. It's true that 3.0 is no better than others on this. By given that it does know the correct answers much more often than eg. GPT 5.2, it does in fact give hallucinated answers much less often.
In short, its hallucination rate as a percentage of unknown answers is no better than most models, but its hallucination rate as a percentage of total answers in indeed better.