This is absolutely meaningless when "right-wing" positions have become correlated with corporate propaganda like global warming denial. You would expect a more correct model to become associated with a left-leaning political association simply because it will answer contentious questions correctly, and at the moment, that usually (but not always) correlates with what people on the left tend to believe.

The question is not whether models "lean politically left", the question is whether they are correct. Musk has a history of being dissatisfied with factually correct answers because they don't fit his political beliefs (e.g. "white genocide"). That's just a fact, although I'm sure Grok would disagree.