Try fable. I haven't used it since they dropped it from the pro plan, but when I did, fable 5 casually dropped such advanced electrical and orbital mechanics knowledge in my story that I had to stop and ask it to explain
Mary packed the binoculars in chapter 3, therefore she may use them on the train in chapter 6.
And it's not technobabble. I like hard sci-fi. I don't pretend to understand every field of tech, nor do so my characters have the same expertise as me. Having an llm with knowledge of basically all fields is helpful.