Grok’s paid plans start at $20/month with a cap of 10 prompts every 2 hours....

https://www.bookmarkingtraffic.win/grok-s-paid-plans-start-at-15-month-and-75-month-with-a-cap-of-about-10

Grok’s paid plans start at $20/month with a cap of 10 prompts every 2 hours. The Pro plan is $50/month, offering increased limits. Note that Grok does not offer a free trial, so you’ll want to be sure before committing