Grok offers a base plan at $15/month with a cap of 10 prompts every 2 hours,...

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

Grok offers a base plan at $15/month with a cap of 10 prompts every 2 hours, suitable for light use. For heavier needs, the Pro plan costs $40/month and removes the prompt limit. Note that all paid plans start immediately—there’s no free trial