Grok’s paid plans start at $30/month for up to 10 prompts every 2 hours, with a...

https://astro-wiki.win/index.php/What_Are_the_Grok_4_Heavy_Benchmark_Scores_Mentioned_for_Heavy%3F

Grok’s paid plans start at $30/month for up to 10 prompts every 2 hours, with a $70/month option for higher usage. Both plans limit prompts to roughly 10 per 2-hour window. There’s no free trial, so you commit upfront