Grok offers plans starting at $30/month with up to 10 prompts every 2 hours....

https://www.active-bookmarks.win/grok-s-paid-plans-start-at-15-month-with-a-pro-tier-at-35-month-each-plan

Grok offers plans starting at $30/month with up to 10 prompts every 2 hours. The $50/month option doubles your prompt limit and adds priority support