Grok’s paid plans start at $20/month and $100/month for higher tiers, with a...

https://wiki-velo.win/index.php/What_Are_Big_Brain_and_Think_Mode_on_SuperGrok%3F

Grok’s paid plans start at $20/month and $100/month for higher tiers, with a cap of about 10 prompts every 2 hours per user. There’s no free trial available, so you’ll want to be sure it fits your needs before subscribing