Grok’s paid plans start at $49/month, with a $99/month option offering more...

https://delta-wiki.win/index.php/Grok_API_Pricing_for_Grok-4.3_Per_1M_Tokens:_A_Deep_Dive

Grok’s paid plans start at $49/month, with a $99/month option offering more features. Usage caps limit you to about 10 prompts every 2 hours, so pacing your queries is important. Note there’s no free trial—subscriptions begin with immediate billing