There is very little information that is illegal by itself. At least in the Western World, and especially in the US. The question is how far you get into the territory of aiding and abetting a crime

But the reasonable defense is that the intended use cases are legal. The home page list a couple, and the 'writing fiction'/'helping authors' case alone covers almost everything. An author asking you how to best conduct a terrorist attack or how Meth is made are perfectly normal. Maybe even tame, compared to what some authors tend to research