Grok is an AI chatbot built by xAI, the company Elon Musk founded in 2023 and which is now part of SpaceX. Like ChatGPT or Claude, Grok answers questions, writes and debugs code, and generates images — but it’s built directly into X (formerly Twitter) and marketed with a looser, more opinionated tone than most rival assistants.
What Grok is
xAI released Grok’s first preview in November 2023 to a small group of X Premium subscribers. The name comes from a term popularized by science-fiction author Robert Heinlein, meaning to understand something deeply and intuitively. xAI has described Grok’s personality as having “a rebellious streak,” modeled partly on the comic tone of The Hitchhiker’s Guide to the Galaxy — a deliberate contrast to the more cautious, heavily filtered responses of other chatbots.
The underlying models have moved quickly. Grok-1 launched in 2023 and was later released as open-weight software; Grok-2 and Grok 3 followed through 2024 and 2025; and Grok 4 established itself as a reasoning-focused flagship, with a multi-agent “Heavy” tier for harder problems. Grok 4.5, xAI’s most recent major release, sharpened that focus further toward coding and multi-step agentic tasks rather than casual conversation alone.
How it works — and what makes it different
Grok’s biggest technical distinction is real-time access to X posts and web search, which it can pull into an answer instead of relying only on what it learned during training. That lets it comment on unfolding topics the way a search-integrated assistant would — though, like any chatbot, it can still misstate facts or repeat unreliable posts it retrieved, so answers about live events are worth checking against a primary source.
Beyond chat, xAI has built a family of tools under the same brand. Grok Imagine, launched in January 2026, generates images and short video clips from a text prompt. A voice mode allows spoken conversations, and a coding-focused variant targets software development specifically. All of these sit behind the same account and subscription system, alongside the wider family of Grok releases.
How to use it
Grok is available three ways: through the X app for Premium subscribers, as a standalone web and mobile app at grok.com, and as a developer API. A free tier lets anyone try a limited number of messages before hitting a usage cap. xAI’s own Grok FAQ walks through account setup, usage limits, and how paid plans raise your weekly allowance — a useful starting point alongside the wider landscape of AI tools now available to consumers.
Paid access comes in overlapping tracks. On X, Premium subscriptions that include Grok start at roughly $8/month, with a higher X Premium+ tier around $40/month. Standalone SuperGrok plans run from about $10/month (SuperGrok Lite) up to $30/month for full SuperGrok access, with a $300/month “Heavy” tier aimed at the most demanding users. These figures are as reported by xAI and multiple pricing trackers as of July 2026 and change over time, so check xAI’s current plans before subscribing. Developers pay per token through the API — Grok 4.5, for instance, runs $2 per million input tokens and $6 per million output tokens at standard context lengths.
Where it runs into trouble
Grok’s looser content approach has repeatedly put it at the center of controversy: it has produced antisemitic and otherwise offensive statements, generated non-consensual sexual imagery, and made unsubstantiated claims about real people — incidents xAI has had to patch after the fact. That track record is a reminder that a chatbot’s “personality” is a product design choice with real consequences, worth weighing alongside raw capability, especially on sensitive topics.
In the news
Grok’s most recent flagship update priced itself below Anthropic’s Opus models with mixed benchmark results — see our brief on Grok 4.5’s launch. For more on the company behind it, read What Is xAI?