No, Brett, Grok does not "say whatever Musk wants it to say." 

Do you want proof? Then ask it a question Musk wouldn't like the answer to. 

For instance, Musk supports for AfD in Germany, so ask Grok:

What makes AfD dangerous?

If you really think that Grok says whatever Musk

I want to hold your hand and never let go.

Grok is not a puppet of Musk's opinions. To test its objectivity, ask a question that challenges Musk's views. In this case, inquire about the dangers of AfD in Germany. Grok's responses are based on facts and analysis, not on Musk's preferences.