Grok’s paid plans start at $19/month and $49/month, with a usage cap of about...

https://cashsbrilliantperspectives.cavandoragh.org/what-is-cached-input-pricing-on-grok-api-and-when-does-it-apply

Grok’s paid plans start at $19/month and $49/month, with a usage cap of about 10 prompts every 2 hours. There’s no free trial available, so you’ll need to commit upfront