Grok’s paid plans start at $20/month and scale up to $80/month, with a strict...

https://lanescooljournal.inkharbory.com/posts/how-much-does-code-execution-cost-on-grok-api

Grok’s paid plans start at $20/month and scale up to $80/month, with a strict limit of about 10 prompts every 2 hours. There’s no free trial available, so you’ll want to be sure this fits your needs before committing