Grok is SpaceXAI's flagship AI assistant, distinguished by its native, real-time access to information from the X platform. Unlike most assistants that rely on static training data, Grok can reason about what's happening right now — making it the preferred tool for power users who need current intelligence alongside deep reasoning.
Overview
Launched in November 2023 by xAI, Grok has evolved into a frontier-class AI system powered by the Colossus supercluster. The assistant is built with a "maximally truthful and curious" design philosophy, delivering direct, unfiltered answers on complex and sensitive topics that other models often avoid.
Grok is no longer an xAI product. SpaceX acquired xAI in an all-stock transaction that closed on February 2, 2026, structuring it as a wholly owned subsidiary. In July 2026 the unit was rebranded SpaceXAI, and xAI ceased to exist as a standalone company. Grok and X are now SpaceX's AI division. The product itself did not move: grok.com and the X integration work as before.
In July 2026, Grok runs on the Grok 4.3 model family, which includes a standard chat variant and a built-in Reasoning mode for deep, multi-step logical problem-solving. The platform is deeply integrated into the X ecosystem but also available as a standalone product and via API for developers.
Grok 4.5 shipped on July 8, 2026, but as a developer-facing release: xAI documents it on the API and Grok Build, and Cursor offers it on all plans. Whether the consumer Grok app and the X integration have moved to 4.5 is not documented, so this page continues to describe the 4.3 family. Note also that Grok 4.5 halves the context window to 500K tokens and roughly doubles the output price.
Key Features
- Real-Time X Integration: Native access to the live global conversation on X, enabling real-time news analysis, trend monitoring, and event summarization unavailable to other models.
- Grok 4.3 Reasoning Mode: A "think-before-you-respond" mode that allocates extended compute to solve complex math, code, and logic problems with high accuracy.
- DeepSearch: An autonomous web research agent that synthesizes information from multiple live sources into a single, cited answer.
- Multi-Modal Understanding: Native vision capabilities for analyzing images, charts, documents, and screenshots.
- Grok Imagine: Built-in image and video generation, exposed to developers through the Imagine API.
- Grok Build: A separate coding model (
grok-build-0.1) trained for agentic coding workflows, with a 256K-token context window. - Voice Mode: Real-time, low-latency voice conversations, plus a Voice Agent API.
- API Access: OpenAI-compatible REST API for developers building on top of the Grok model family.
How It Works
Grok processes your requests through several specialized systems working in parallel:
- Live Data Retrieval: Simultaneously queries X's firehose and public web sources for real-time context.
- Reasoning Engine: Allocates thinking tokens to plan and verify multi-step answers before generating output.
- Response Generation: Produces a direct, cited response using the combined context of live data and model knowledge.
Technical Architecture:
- Models: Grok 4.3 (standard chat and reasoning modes). Grok Build is the separate coding model.
- Context Window: 1,000,000 tokens (1M) for Grok 4.3; 256K for Grok Build.
- Reasoning: Configurable on Grok 4.3.
- Training Infrastructure: xAI's Colossus supercluster.
- API Standard: OpenAI-compatible REST API.
- Multimodality: Text, Image (Vision + Grok Imagine generation), Voice.
Use Cases
Research & Information
- Real-Time News Analysis: Tracking breaking events and synthesizing multiple live sources into a coherent summary.
- Market Intelligence: Monitoring social sentiment, trend shifts, and competitive activity directly from the X firehose.
- Academic Research: Using DeepSearch to cross-reference sources and synthesize complex technical information.
Development & Coding
- Complex Problem Solving: Using Reasoning Mode to tackle algorithmic challenges, math proofs, and system design questions.
- Code Review: Analyzing code for bugs, security vulnerabilities, and performance issues.
- API Integration: Building Grok-powered features directly into applications.
Content & Analysis
- Content Creation: Writing, editing, and brainstorming with unfiltered directness.
- Data Analysis: Interpreting charts, tables, and screenshots via vision capabilities.
Getting Started
Step 1: Access Grok
- Visit grok.com or open the X (Twitter) mobile app.
- Sign in with your X or xAI account.
- Free users get access to standard Grok; SuperGrok unlocks higher usage limits and advanced features.
Step 2: Enable Reasoning Mode
- Start a new conversation.
- Click the "Think" toggle in the input bar to activate Reasoning Mode.
- Submit your complex question — Grok will show its thinking process before answering.
Step 3: Use DeepSearch
- Click the DeepSearch button (globe icon) to activate live web research.
- Ask a question that requires current information (e.g., "What happened with the Fed rate decision today?").
- Grok will cite its sources in the response.
Step 4: Access the API
- Visit console.x.ai.
- Create an API key.
- Use the standard OpenAI SDK by pointing it to
https://api.x.ai/v1.
Best Practices
- Use Reasoning Mode for math, logic, and multi-step coding tasks.
- Use DeepSearch when you need current news or verified facts.
- Be direct: Grok responds best to clear, specific prompts.
Pricing & Plans
- Free Tier: Access to standard Grok 4.3 with daily usage limits.
- SuperGrok ($30/month): Longer conversations in Chat, higher usage on Grok Imagine, Voice Mode and Companions, and early access to new features.
- SuperGrok Heavy: A higher tier with maximum usage limits and early feature access. Check grok.com for the current price.
- API (Pay-as-you-go) — prices in USD, from docs.x.ai/docs/models:
- Grok 4.3: $1.25 per 1M input tokens, $2.50 per 1M output tokens.
- Grok Build 0.1 (coding): $1.00 per 1M input tokens, $2.00 per 1M output tokens.
- Imagine API: $0.02 per image; $0.05 per second of video.
- Voice API: $3.00/hour (agent), $15.00 per 1M characters (TTS).
Limitations
- Primary Data Source: Real-time data is sourced primarily from X; broader web coverage is via DeepSearch only.
- No live knowledge by default: xAI notes that Grok has no knowledge of events beyond its training data unless you enable server-side search tools (Web Search / X Search).
- Availability: Some features require an X Premium or SuperGrok subscription.
Community & Support
- Official Website: grok.com
- API Docs: docs.x.ai
- X (Twitter): @xai for updates
- Discord: Official xAI Discord