Grok offers a Starter plan at $20/month and a Pro plan at $50/month, both...

https://atomic-wiki.win/index.php/Does_Grok_Free_Tier_Include_Memory_and_Projects%3F

Grok offers a Starter plan at $20/month and a Pro plan at $50/month, both limiting usage to about 10 prompts every 2 hours. Note, there’s no free trial on paid plans, so you pay upfront. These caps help manage costs and prevent overuse for small teams.