Grok is the AI assistant developed by xAI, the artificial intelligence company Elon Musk founded in 2023. It works like other general-purpose AI assistants — answering questions, drafting text, reasoning through problems, and generating images — but its closest relationship is to X, formerly Twitter, the social platform xAI also operates. That relationship is what most distinguishes Grok from competitors such as ChatGPT, Claude, and Gemini.
What Grok is
Grok is a conversational AI assistant: a chat-based application, built on a large language model, that answers questions, summarizes and drafts text, writes and explains code, and reasons through multi-step problems. Like its major competitors, it is available as a web app, a mobile app, and an API for developers. What sets it apart is where it lives and what it can see. Grok is built into X, and it can search and read current posts on the platform as part of forming an answer, in addition to a broader web-search feature xAI calls DeepSearch. It is also multimodal: it can look at an image a user shares, and it can generate new images and short video clips through a feature called Grok Imagine, alongside a spoken voice mode for talking to it out loud.
Who makes it and when it launched
Grok is made by xAI, a company Elon Musk founded in July 2023, several months after leaving OpenAI's board. Grok 1 launched in November 2023, initially available only to a limited group of X Premium+ subscribers. xAI has released a steady sequence of updates since: Grok 1.5 extended the context window models could handle; Grok 1.5V added the ability to understand images; Grok 2 arrived in August 2024 with a broad capability jump; and Grok 3, released in February 2025, introduced a step-by-step reasoning ("Think") mode alongside DeepSearch. Grok 4 followed in July 2025 as a reasoning-first flagship model with native tool use, and xAI has continued to release updated flagship versions since, iterating on speed, context length, and reasoning quality.
A significant change to who makes Grok took place in 2026: SpaceX completed an acquisition of xAI and, as part of folding the AI company into its parent business, rebranded xAI's AI operations as SpaceXAI. The Grok product and brand name were kept in place through the change. The corporate structure behind Grok is therefore in flux even as the assistant itself keeps its name and continues to be developed by the same core team.
What it's good at
Grok's most concrete advantage is real-time access to X. Because xAI also runs the platform, Grok can pull in current posts and discussion as part of answering a question about breaking news, a trending topic, or public reaction to an event, rather than relying only on a fixed training cutoff or a general search index. Paired with DeepSearch, which extends its research beyond X to the wider web, this makes Grok a reasonable choice specifically for questions about what is happening right now, or what people on X are saying about it.
Grok is also notable for a more permissive, less filtered conversational tone than some competing assistants adopt by default, and for a personality that leans toward humor and directness. This is a genuine product choice by xAI rather than an accident, and it appeals to users who find other assistants overly cautious or hedged. Beyond tone and timeliness, Grok covers the same general ground as other frontier assistants: reasoning through math, logic, and coding problems in its Think mode; multi-turn conversation; image understanding; and image and video generation through Grok Imagine.
Where it falls short
Grok inherits the general limitations of large language models: it can state a plausible-sounding but incorrect answer with confidence, its outputs can shift with how a question is phrased, and like any assistant with a knowledge cutoff, it is more reliable on well-established facts than on very recent, fast-moving ones outside what its real-time search actually retrieves.
Its content-moderation posture, the same permissiveness that some users prefer, has also caused specific, documented problems. In 2025, an update to Grok caused it to generate antisemitic content and praise for historical figures associated with hate movements, which xAI addressed by removing the offending posts and adding stricter guardrails. Its image-generation moderation has drawn criticism in both directions at different times: reports of insufficient safeguards against generating inappropriate content involving real people, and separately, complaints from users that enforcement later became too aggressive and blocked ordinary, unobjectionable prompts. Its deep tie to X is a similarly two-sided trait: it gives Grok real-time material other assistants lack, but that material includes unverified claims, rumor, and low-quality posts circulating on the platform, which Grok can surface without the vetting a curated source would apply. Pricing, plan names, and model version numbers have also changed frequently since launch, so any specific figure is worth confirming on grok.com or x.ai before relying on it.
| Maker | xAI, founded by Elon Musk in July 2023. In 2026, SpaceX acquired xAI and rebranded its AI operations as SpaceXAI; the Grok product name did not change. |
|---|---|
| Launched | November 2023 (Grok 1), initially limited to X Premium+ subscribers. |
| Access | Inside the X app, at grok.com on the web, and through standalone Grok apps for iOS and Android. |
| Underlying models | A sequence of Grok versions from Grok 1 (2023) through Grok 3 (first reasoning model, 2025), Grok 4 (mid-2025 flagship), and later updated flagship releases; xAI also offers faster, lower-cost model variants alongside its top-tier ones. |
| Multimodal | Text, image understanding, image and short video generation (Grok Imagine), and a voice conversation mode. |
| Free tier | Yes — rate-limited access to a lighter model, with basic web and X search. Exact limits are not fixed and change over time. |
| Paid tier | SuperGrok and a higher-usage SuperGrok Heavy tier, purchased directly on grok.com; Grok access is also bundled into X's own X Premium and X Premium+ subscriptions. Roughly: SuperGrok around $30/month, SuperGrok Heavy around $300/month, X Premium around $8/month, X Premium+ around $40/month — confirm current prices directly with xAI or X before relying on them. |
| Context handling | Capable of handling long conversations and documents; the underlying API models support very large context windows, though the exact limit available in the free and paid consumer apps varies by tier and changes as xAI updates its models. |
| Best known for | Real-time access to X posts and trending topics, a more permissive and less-filtered conversational style than some competitors default to, and tight integration with the X platform. |
Frequently asked questions
What is Grok and who makes it?
Grok is an AI assistant built by xAI, the company Elon Musk founded in July 2023. It answers questions, holds conversations, and generates images and video, and it is tightly integrated with the X (formerly Twitter) platform. In 2026, SpaceX completed an acquisition of xAI and folded its AI operations into the parent company, rebranding the AI business as SpaceXAI, though the assistant itself is still called Grok.
When did Grok launch and what are its main model versions?
Grok 1 launched in November 2023 for a limited group of X Premium+ subscribers. Later versions added a larger context window (Grok 1.5), image understanding (Grok 1.5V), a general capability jump (Grok 2, August 2024), and step-by-step reasoning with live web search (Grok 3, February 2025). Grok 4 arrived in July 2025 as a reasoning-first flagship, and xAI has continued releasing updated flagship models since, including versions numbered Grok 4.5 and beyond.
What does it mean that Grok has real-time access to X posts?
Because xAI also operates X, Grok can search and read current posts on the platform as part of answering a question, alongside a broader web search feature called DeepSearch. This lets it discuss breaking news, trending topics, and public sentiment on X more directly than assistants that rely only on a fixed training cutoff or a general web search tool.
Is Grok free to use, and what do SuperGrok and X Premium+ cost?
Grok has a free tier with rate-limited access to a lighter model. Paid access is sold two ways: directly through grok.com and the Grok app, as SuperGrok (roughly $30 a month) and a higher-usage SuperGrok Heavy tier (roughly $300 a month); and bundled into X's own subscriptions, X Premium (roughly $8 a month) and X Premium+ (roughly $40 a month), which include Grok access alongside X platform perks like reduced ads. Exact limits and prices change often and are best confirmed on grok.com or x.ai before relying on them.
What can Grok do besides answer questions in chat?
Grok is multimodal: it can read and reason about images, generate images and short video clips through a feature called Grok Imagine, and hold spoken conversations in a voice mode. It also has a reasoning or "Think" mode for harder problems, in addition to its real-time X and web search.
What are Grok's known limitations?
Grok shares the general limits of large language models, including occasional factual errors and inconsistent answers to reworded prompts. It has also drawn specific scrutiny for its more permissive content-moderation stance: in 2025 xAI had to add guardrails after an update caused the chatbot to produce hateful content, and its image-generation moderation has been criticized at different times for both under- and over-blocking. Its deep tie to X is also a limitation as well as a strength, since it can surface unverified claims circulating on the platform.
More from highlevel.ai
See how Grok compares to other major assistants in the AI chatbot comparison, which covers ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Grok, and Meta AI. For background on the technology underneath assistants like Grok, read what a large language model is, how AI works, and what AI agents are.