Why did they exclude Grok? Given the published philosophical differences in how Grok is trained, it would provide an interesting data point.

You can argue all day about those differences, but missing this opportunity to observe them in an objective way is disappointing.

Because its owner is one of the worst persons alive. Don't feed the evil, don't use his stuff!

Title says “Frontier” which would exclude Grok.

Grok is trained to have a bias, which a lot of people like, but it’s not meant to be accurate.