Grok is an AI-powered conversational assistant built and maintained by xAI. It’s designed to combine a chat-style interface with live web access and tight integration with X (Twitter), enabling it to fetch up-to-date information, cite sources, and synthesize content from social posts and web pages. Grok offers multiple model variants and modes — from fast, lightweight responses to higher‑compute “think” or “big brain” reasoning modes — to handle general Q&A, complex problem solving, code generation, and research-oriented workflows.

The product surface includes the grok.com web app, native iOS and Android apps, access inside X for certain subscription levels, and a developer API that lets applications call Grok models. Feature highlights include DeepSearch (an agentic research mode that explores multiple web and X sources and returns a cited report), multimodal capabilities for processing images and documents, image generation tools, configurable context windows for longer conversations, and subscription tiers that raise usage limits and unlock advanced capabilities like extended context, priority processing, and expanded multimodal or voice features.

Use cases span everyday productivity (summaries, drafting, brainstorming), developer tasks (code generation, debugging, code explanation), research and analysis (DeepSearch reports, data synthesis), and creative work (image generation, ideation). The audience ranges from casual users on X who want quick, witty conversational answers to professionals, researchers, and developers who need higher-throughput or programmatic access via API and premium plans. Enterprise and power users can pay for higher quotas, faster response tiers, and expanded feature access, while casual users can try core Grok features for free or via X-integrated access.