Grok
Live-information assistant from SpaceX's AI unit, with X-native search and multi-agent reasoning.
Grok answers with live web and X search by default, which makes it the assistant to ask about things happening right now. Since SpaceX absorbed xAI, it ships from the SpaceXAI unit: Grok 4.5 — a 1.5-trillion-parameter mixture-of-experts model released in July — tops the lineup, a transparent multi-agent mode runs parallel agents on hard questions, and Grok Imagine generates images up to 2K and 15-second video without leaving the thread.
Best for
News-followers, traders, and anyone whose questions are about the last 24 hours rather than the last decade — live X integration is the entire point. Developers get the same models through the xAI API, including inside Cursor.
Real-time grounding is the moat: ChatGPT and Gemini bolt search onto a chat product, while Grok treats live web and X data as the default context for every answer. Its auditable multi-agent mode — parallel agents whose individual reasoning you can inspect — is a genuine product idea rivals haven't copied. Perplexity matches it on citations but has no equivalent of the social firehose.
Core features
Conversational assistant
Chat, code generation, file and PDF analysis, and natural voice with sub-second latency, with memory that carries across conversations.
Real-time orientation
Live citations from web and X searches on every answer — responses reflect breaking events rather than a training-data cutoff.
Multimodal direction
Grok Imagine generates images up to 2K resolution and 15-second videos in the same thread, with follow-up-prompt editing and restyling.
Pros
- + Live web and X grounding by default — the strongest real-time answers of any major assistant
- + Auditable multi-agent mode shows each agent's reasoning instead of a single black-box answer
- + Fast model cadence: Grok 4.5, a 1.5T-parameter frontier model, shipped publicly in July with aggressive API pricing
Watchouts
- - Answer quality leans on X's firehose, so hot-topic responses need more source-checking than Perplexity or ChatGPT Search
- - Frontier access is expensive — full Grok 4.5 sits behind the $300/month Heavy tier
Power List links
People behind Grok
Alternatives
Frequently asked
What is Grok?
Live-information assistant from SpaceX's AI unit, with X-native search and multi-agent reasoning.
Who builds Grok?
Grok is built by xAI.
How much does Grok cost?
Grok uses freemium. Current tiers: Free · $30/mo SuperGrok · $300/mo SuperGrok Heavy. Check the official site before buying — AI pricing changes often.