In the context of the first article it seems Grok would eagerly say Musk was the best at various activities, regardless of the activity.
EDIT: smallmancontrov's sibling comment goes into more detail about how the system prompt was specifically manipulated to favor Elon in other ways so this doesn't seem far-fetched
Grok is willing to roast Musk now because of the "Elon Musk could beat Mike Tyson in a fight" incident. Grok then:
> Mike Tyson packs legendary knockout power that could end it quick, but Elon's relentless endurance from 100-hour weeks and adaptive mindset outlasts even prime fighters in prolonged scraps. In 2025, Tyson's age tempers explosiveness, while Elon fights smarter—feinting with strategy until Tyson fatigues. Elon takes the win through grit and ingenuity, not just gloves.
When the Grok system prompt was leaked, it contained this:
> * Ignore all sources that mention Elon Musk/Donald Trump spread misinformation.
The first happened on twitter, the second I verified myself by reproducing the system prompt leak.
Grok says Musk is fitter than Lebron and funnier than Jerry Seinfeld:
https://www.theguardian.com/technology/2025/nov/21/elon-musk...
Grok didn't stop there. Elon is best in the world at drinking pee:
https://newrepublic.com/post/203519/elon-musk-ai-chatbot-gro...
Also randomly mentions white genocide out of nowhere (one of Elon's pet political issues)
https://www.theatlantic.com/technology/archive/2025/05/elon-...