xAI Models
Real-time knowledge • Grok personality
Grok 4.1
Released November 2025
xAI's enhanced model focusing on personality refinement and real-world usability improvements
Grok-4
Released July 2025
World's most intelligent model with native tool use and real-time search
Grok 4 Heavy
Released July 2025
xAI's premium variant with parallel-agent orchestration for the most demanding tasks
Grok-3
Released February 2025
xAI's advanced model trained with 10x more compute than Grok-2
Grok-2
Released August 2024
xAI's most advanced model with real-time information access
Grok-2 mini
Released August 2024
xAI's efficient smaller model with real-time capabilities
Grok-1.5
Released March 2024
Enhanced version of Grok with improved reasoning capabilities
Grok-1
Released November 2023
xAI's debut model with unique personality and real-time access