What Is Grok on X?

Grok is the AI assistant made by xAI and built into X. You can open it from X's navigation to ask questions, brainstorm and get explanations, or tag @grok in a reply to ask it about the post you are reading.

X describes it on its About Grok help page. Replying to Grok by tagging it arrived in March 2025, as TechCrunch reported.

Access and plans

Free accounts get a limited daily allowance. Since 12 October 2026, new buyers get more Grok usage through The X Subscription, which bundles Grok, Cursor and X Premium benefits, with paid tiers sharing one weekly usage pool, according to the Cursor announcement. Daily limits change often and sources disagree on the exact numbers, so check your own account.

X may share public data and your Grok interactions with xAI. The help page explains how to opt out of having your data used for training.

Example

You see a thread full of jargon about interest rates. You reply "@grok explain this simply" and Grok answers in the replies, where everyone reading the thread can see it.

Why it matters for growth

• Fast research. Ask Grok to summarise a long thread or explain a term before you reply, so your reply adds something real.
• Public Grok replies are visible. Asking Grok under someone else's post puts the exchange in their replies. Keep it relevant.
• Your posts may be summarised. Clear, factual posts are easier for Grok and readers to represent correctly.

Grok can be wrong. Check facts and numbers before you repeat them in a post.

Related terms

• X Premium
• Algorithm
• Mention
• Reply
• Community Notes

Frequently asked questions

Is Grok free on X?

There is a limited free allowance. Paid X plans include more usage.

Does Grok rank my posts?

X's published For You ranking code uses a model based on Grok to predict engagement. See algorithm for details.

Last checked November 2026.

Turn your research into a finished draft with the post generator.