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Grok 4.1 Fast is xAI's best tool-calling model with a 2M context window. It reasons and completes agentic tasks accurately and rapidly, excelling at complex real-world use cases such as customer support and finance. To optimize for speed use this variant. Otherwise, use the reasoning version.
import { streamText } from 'ai'
const result = streamText({ model: 'xai/grok-4.1-fast-non-reasoning', prompt: 'Why is the sky blue?'})Try out Grok 4.1 Fast Non-Reasoning by xAI. Usage is billed to your team at API rates. Free users get $5 of credits every 30 days, and you are considered a free user if you haven't made a payment.
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