Grok’s paid plans start at $49/month and $99/month, each allowing about 10...

https://garrettsinsightfulchat.wordcanopy.com/posts/does-grok-free-tier-include-memory-and-projects

Grok’s paid plans start at $49/month and $99/month, each allowing about 10 prompts every 2 hours. There’s no free trial, so you pay upfront. If you hit the prompt cap, you’ll need to wait or upgrade