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Grok 4.1 Fast Non-Reasoning

Grok 4.1 Fast Non-Reasoning is xAI's speed-optimized Grok 4.1 Fast model for agentic tool calling. It delivers direct responses without reasoning overhead across a context window of 2M tokens, engineered for high-throughput agent workflows.

Tool UseImplicit Cachingtiered-costVision (Image)File InputWeb Search
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'xai/grok-4.1-fast-non-reasoning',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • What makes Grok 4.1 Fast Non-Reasoning different from Grok 4 Fast Non-Reasoning?

    Grok 4.1 Fast Non-Reasoning is the next iteration, specifically optimized for agentic tool-calling operations with an expanded context window of 2M tokens. It builds on the Grok 4 Fast foundation with improved tool-use capabilities.

  • What is the context window for Grok 4.1 Fast Non-Reasoning?

    2M tokens, supporting extensive tool schemas, conversation histories, and retrieved documents within a single request.

  • What does 'non-reasoning' mean?

    The model produces direct responses without generating chain-of-thought reasoning traces. This reduces latency and output token cost, which is ideal for agentic loops where speed matters.

  • What does Grok 4.1 Fast Non-Reasoning cost?

    Check the pricing panel on this page for today's numbers. AI Gateway tracks rates across every provider that serves Grok 4.1 Fast Non-Reasoning.

  • How do I authenticate with Grok 4.1 Fast Non-Reasoning through Vercel AI Gateway?

    Use your Vercel AI Gateway API key with xai/grok-4.1-fast-non-reasoning as the model identifier. No separate xAI account is needed for gateway-managed access.

  • Is Grok 4.1 Fast Non-Reasoning suitable for non-agentic tasks?

    Yes, it handles general text tasks well. However, its design is optimized for agentic tool-calling patterns. For pure text generation or analytical reasoning, other Grok variants may be better suited.

  • Does Vercel AI Gateway support Zero Data Retention for Grok 4.1 Fast Non-Reasoning?

    Zero Data Retention is not currently available for this model. ZDR on AI Gateway applies to direct gateway requests; BYOK flows aren't covered. See https://vercel.com/docs/ai-gateway/capabilities/zdr for details.