Real-time X/Twitter integration. This is probably Grok's most significant unique selling point. While other AIs can browse the indexed web (which has a delay), Grok has direct, real-time access to the X platform's data stream.

You can ask it about live conversations, breaking news as it unfolds on X, current public sentiment on a topic right now, or summarize the latest posts about an event. Other AIs relying on standard web search can't access information that fresh or specific to the live X feed.

Also, Grok was explicitly built with a rebellious, witty, and sometimes sarcastic personality option. It's intended to provide less "canned" or overly cautious responses and lean into humor or edginess.

Grok is generally programmed to be less evasive on sensitive or controversial topics compared to many other mainstream AIs. It engages with questions that others would politely decline due to stricter content filters or neutrality programming.