As of September 2026, Grok offers two purchasing options: directly at grok.com...

https://chloesbrilliantjournal.capitaljays.com/posts/what-does-cached-input-pricing-mean-on-xai-api

As of September 2026, Grok offers two purchasing options: directly at grok.com and via the X platform. There’s no paid-plan trial, but a free tier limits you to about 10 prompts every two hours