Grok 4 Fast

Grok 4 Fast is a cost-efficient reasoning model designed for Enterprise and Consumer domains, delivering frontier-level performance with exceptional token efficiency. It features a unified architecture that blends reasoning and non-reasoning modes in one model, making high-quality reasoning accessible to more users and developers. Grok 4 Fast was trained end-to-end with tool-use reinforcement learning, exceling at deciding when to invoke tools like code execution or web browsing, and seamlessly browsing the web and X to augment queries with real-time data. This model is ideal for organizations and developers seeking to integrate cost-efficient intelligence into their applications, as it provides a significant reduction in price to achieve the same performance on frontier benchmarks as Grok 4, with a 98% reduction in price, as verified by an independent review from Artificial Analysis.