Grok is xAI's conversational AI assistant with real-time access to X (Twitter) data. Built by Elon Musk's AI company with a focus on wit and curiosity.
February 2, 2026
xAI announced the Grok Imagine API, offering state-of-the-art video generation across quality, cost, and latency. This represents a new API capability for video generation built on the Grok platform.
November 17, 2025
Grok 4.1 is now available to all users on grok.com, X, and the iOS and Android apps. It is rolling out immediately in Auto mode and can be selected explicitly as 'Grok 4.1' in the model picker. A fast variant, Grok 4.1 Fast, was also introduced along with Agent Tools API for next-generation tool-calling agents.
July 14, 2025
Grok 4 is described as the most intelligent model in the world, featuring native tool use and real-time search integration. It is available to SuperGrok and Premium+ subscribers as well as through the xAI API. A new SuperGrok Heavy tier was also introduced with access to Grok 4 Heavy, the most powerful version of Grok 4.
August 13, 2024
Major capability upgrade. Image generation integrated. Beats Claude 3 Opus and GPT-4o on several benchmarks.
March 28, 2024
Significant reasoning improvements. Context window expanded to 128K tokens. Better at math and coding tasks.
November 4, 2023
xAI launches Grok. Real-time X data access. Designed to answer questions others refuse. Available to X Premium subscribers.