My assumption with Grok, and please correct me if I'm wrong, was that they tried to control it's alignment through the contextual model prompt it was given, rather than the corpus of data it was trained on or fine tuning.
As an aside, on a whim I went over to Gab the other day (the "free speech social network") to see if it still existed. Apparently they have created a large number of LLMs like BasedAI or something that are supposed to be like Grok, and, like Grok, they fail in their mission in equally hilarious ways. Users will ask BasedAI whether the Jews control the world, and it will say no, and then they get really mad.