The art for Subete Ga F Ni Naru is much more "realistic" that most of the anime that's been coming out lately. It seems to me that each character is unique enough that they could be based on real life "models". Is there any documentation or word from the creators if this is the case and if it is, who the original models were?
EDIT: in answer to the request to define reality: as you can see below, the art does not rely on different hair colors or hair styles to differentiate the characters. Each character has distinct facial features that reflect reality rather than an moefied idealized anime world.