I had a friend who tried Grok, but he was unsatisfied when it kept telling him something wrong.
I use Grok at work along with ChatGPT. Both seem to be more accurate than the AI assist on Google.
However I am asking very specific, technical information and sometimes the answers are incorrect.
The problem is the input. These AI programs scour the internet for information and if a scientific publication is either mistaken in its findings or outright fraudulent AI could use it as a reference, inadvertently.
So I check all the information before writing a protocol or technical report.
So far I am impressed with Grok and ChatGPT as a type of super search engine more than programs that come up with original content.