grok-4-fastGrok 4 Fast is a Grok-family AI model, from xAI, released Sep 19, 2025.
Scores on standardized evaluations. Higher is better — and rank shows where Grok 4 Fast lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Novel ML problem-solving
Human-rated web development
Model & benchmark data from Epoch AI (CC BY); pricing, specs & descriptions from OpenRouter.