Grok’s paid plans start at $30/month and go up to $100/month, with a cap of...

https://weekly-wiki.win/index.php/What_Does_grok-build-0.1_Cost_and_When_Should_I_Use_It%3F

Grok’s paid plans start at $30/month and go up to $100/month, with a cap of about 10 prompts every 2 hours. There’s no free trial available, so you’ll want to pick a plan that fits your regular usage