As of September 2026, Grok offers two purchase routes: grok.com and via X....

https://bizzmarkblog.com/how-to-audit-my-code-for-old-grok-model-aliases/

As of September 2026, Grok offers two purchase routes: grok.com and via X. There’s no paid-plan trial available. The free tier limits usage to about 10 prompts every 2 hours. Paid plans on grok