Grok
Grok is xAI's AI assistant integrated into X (formerly Twitter) with real-time access to platform data and a more conversational, edgy tone. Available models include Grok-1 (March 2024), Grok-2 (re-released as Grok 2.5 in August 2026 under source-available license), Grok 3 Beta (February 2026, 314B parameters, 128K token context), Grok 4 (July 2026) with advanced multi-agent architecture, and Grok 4.1 (latest) with improved real-world reasoning and emotional intelligence. Provides answers, analysis, and creative content generation with direct integration into X platform. Available through X Premium+ subscription, offering both web and mobile access. Features include real-time web search, code generation, and creative writing with a distinctive personality.