> ## Documentation Index > Fetch the complete documentation index at: https://docs.siray.ai/llms.txt > Use this file to discover all available pages before exploring further. # Grok 4 Fast Non Reasoning > xAI's Grok 4 Fast Non-Reasoning is a cost-efficient LLM with a 2M context, optimized for high-speed, low-latency, straightforward queries, and rapid search synthesis. ### Model Use Cases A cost-efficient LLM with a 2M context. It is optimized for high-speed, low-latency, straightforward queries, and rapid search synthesis. ### Key Features * **Max Speed:** Delivers the fastest, most direct output by skipping the internal reasoning steps. * **Rapid Retrieval:** Ideal for quick information extraction, summarization, and search-augmented generation. * **2M Context:** Retains the massive context window for fast processing of very large inputs.