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Think Boldly with Grok 4
Trained on a 200,000-GPU cluster with 6x efficiency gains — native tool use, real-time web and X search, 256K context, expert-level reasoning across science and code
The Most Powerful Model From xAI
Grok 4 is xAI's flagship AI model, released July 9, 2025, trained using reinforcement learning on the Colossus 200,000-GPU cluster. It was built with a 6x improvement in compute efficiency and a massive expansion of verifiable training data beyond the previous focus on math and coding to cover many more knowledge domains. The resulting model is designed for expert-level reasoning across science, mathematics, software development, and complex real-world problem solving. Grok 4 is the first xAI model built to use tools autonomously — it was trained to operate a code interpreter and web browser as naturally as it uses language, selecting its own search queries rather than waiting to be told what to look up. Available in Chat Smith.
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Native Tool Use Trained Into the Core
What sets Grok 4 apart from many reasoning models is that tool use isn't an add-on — it was baked into the model through reinforcement learning from the start. Grok 4 autonomously operates a code interpreter to run calculations, write and execute code, and verify answers through computation. It controls a web browser to navigate pages, extract information, and follow chains of links to reach the most complete and accurate answer. And it uses real-time X (Twitter) search to access current discussions, recent posts, and breaking information that goes beyond what any static training dataset can capture. This combination gives Grok 4 a research capability that feels more like a diligent analyst than a chatbot.
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Real-Time Web and X Search Built In
Grok 4 integrates real-time web search and X (formerly Twitter) search — including keyword search, semantic search, and media search — directly into its reasoning process. This means when you ask a question that touches on current events, recent research, live market data, or any topic where currency matters, Grok 4 can pull fresh information and synthesize it rather than relying only on its training cutoff. The X search integration is particularly distinctive: Grok 4 can search the full text of posts, user profiles, and media threads on X, giving it access to a real-time stream of human knowledge and conversation that no other major model has as a native capability.
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Expert-Level Reasoning Across Many Domains
Grok 4's training expansion — moving from primarily math and coding verifiable data to a much broader set of knowledge domains — resulted in expert-level reasoning that generalizes well beyond technical tasks. Whether you're working through complex scientific analysis, researching historical context for a strategic decision, diving deep into a domain you're not an expert in, or building understanding of an unfamiliar subject from first principles, Grok 4 engages with the material at a depth that reflects its expanded training scope. Combined with its tool use capabilities, it can research and reason simultaneously rather than having to choose between them.
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256K Context for Complex, Extended Work
Grok 4 supports a 256,000-token context window, large enough to hold entire codebases, lengthy research corpora, or extensive project documentation in a single conversation. The model maintains coherence across this full context, meaning earlier parts of a long conversation or document remain relevant and accessible throughout the interaction. For developers reviewing complex systems, researchers synthesizing large bodies of literature, or professionals working through extensive documentation, this context capacity makes Grok 4 a practical tool for the kinds of sustained, deep work that requires holding a lot of information in view at once.
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Multiple Models, One Platform
Access leading AI models in one place, compare responses, and choose the best answer for every task.
Multiple Models
Access GPT, Claude, Gemini, DeepSeek, Grok, and more in one place.
Better Value
Get access to premium AI models without paying for multiple subscriptions.
Easy Comparison
Compare responses across different models to find the best answer for every task.
One Workspace
Chat, write, research, and create with your favorite AI models in a single app.
Just 3 Simple Steps
Chat with an advanced AI assistant to get answers, solve problems, generate content, and explore ideas in seconds.
Step 1
Enter a question, task, or topic you'd like help with, and provide any details or context that may be relevant.
Step 2
The AI analyzes your request and generates accurate, relevant, and context-aware responses in real time.
Step 3
Continue the conversation, refine your instructions, and explore new ideas through natural back-and-forth interactions.
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Ask Us Anything
What is Grok 4 on Chat Smith?
Chat Smith gives you access to xAI's Grok 4, one of the most powerful reasoning AI models available today. It excels at deep analysis, complex problem solving, advanced coding, creative writing, and multi-step reasoning, delivering thorough, nuanced responses when you need AI at its most capable.
How does Grok 4 work inside Chat Smith?
Open Chat Smith, select Grok 4 from the model picker, and start chatting. The app sends your prompt to the model and streams a detailed response in real time. No API keys or technical setup required — the full power of xAI's flagship model is available through a simple, intuitive chat interface.
What makes Grok 4 different from other AI models?
Grok 4 is built for depth. It handles complex, multi-layered questions with strong logical reasoning, nuanced analysis, and a distinctive direct communication style. Where lighter models prioritize speed, Grok 4 prioritizes thoroughness and accuracy, making it the right choice for challenging tasks that demand serious thinking.
What can I use Grok 4 for?
It handles demanding tasks including deep research analysis, advanced mathematics, complex coding and debugging, long-form creative writing, strategic planning, detailed document review, scientific reasoning, and philosophical exploration. Choose Grok 4 when the quality and depth of the answer matter more than instant speed.
Does Grok 4 support image and multimodal input?
Yes. Through Chat Smith you can send images alongside text prompts. Grok 4 can analyze photographs, interpret charts and diagrams, extract information from visual content, and answer complex questions that combine text and image understanding for comprehensive multimodal analysis.
How accurate are responses from Grok 4?
Grok 4 delivers exceptional accuracy on reasoning-heavy tasks, mathematics, coding, and factual analysis. Its deep processing architecture is designed to think through problems carefully before responding. For critical decisions, cross-referencing important claims with authoritative sources remains a recommended practice.
How can I get the best results from Grok 4?
Provide detailed context, specify your reasoning requirements, and describe exactly what kind of output you need. Grok 4 thrives on complex, well-defined prompts. For multi-step tasks, outline the steps explicitly. The richer and more specific your instructions, the more impressive and precise the output becomes.
How does Grok 4 compare to faster models like Grok 4 Fast?
Grok 4 is the full-power reasoning model that takes more time to deliver deeper, more comprehensive answers. Grok 4 Fast trades some of that depth for significantly quicker responses. Use Grok 4 when you need thorough analysis and detailed reasoning; switch to Grok 4 Fast for everyday speed-first tasks.
Can I switch between Grok 4 and other models on Chat Smith?
Yes. Chat Smith lets you switch between AI models at any time, even mid-conversation. Use Grok 4 for complex analysis, switch to a faster model for quick questions, and come back to Grok 4 when depth matters again. This flexibility ensures you always match the model to the task.
Is Grok 4 on Chat Smith free to use?
You can start chatting with Grok 4 for free with no software to install or complicated sign-up process. Chat Smith provides generous free access, while premium plans unlock higher message limits and additional AI models for users who rely on advanced AI reasoning throughout the day.
Is my data safe when using Grok 4?
Chat Smith is committed to user privacy. Your conversations are processed to generate responses and managed according to the app's privacy policy. Chat Smith does not sell personal data to third parties. Review the privacy policy in app settings for complete details on data handling.
Do I need technical knowledge to use Grok 4?
Not at all. Chat Smith is designed for everyone. Open the app, choose Grok 4, and type your question in everyday language. No programming, API setup, or AI expertise needed. Whether you are tackling a research project or exploring a creative idea, powerful reasoning AI is just one tap away.
