Grok’s paid plans start at $20/month and include up to 10 prompts every 2...

https://seo.edu.rs/blog/why-supergrok-heavy-300-a-month-is-worth-it-for-some-teams-11220

Grok’s paid plans start at $20/month and include up to 10 prompts every 2 hours, suitable for steady users. There’s no free trial, so you pay from day one