I've been teaching myself physics lately and have found Grok to be one of the best both at coming to a correct answer and helping me to understand how to get it myself. It also seems a lot better than other models at saying "I don't know" or pointing out when my question doesn't make sense.
I'm just trying to get it to help me learn physics. If my topic of interest shifts to mid-20th century European history I'll keep what you said in mind.
If you're going to use the model to learn history you're going to learn the version of history that the model teaches you. A little bit of digging around grokpedia should give you some idea of what that model thinks