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Grok 4 Fast Non-Reasoning

Grok 4 Fast Non-Reasoning is the speed-optimized, non-reasoning variant of xAI's Grok 4 Fast. It delivers fast inference without chain-of-thought overhead, tailored for high-throughput applications within a context window of 2M tokens.

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index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'xai/grok-4-fast-non-reasoning',
  prompt: 'Why is the sky blue?'
})
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Playground

Try out Grok 4 Fast Non-Reasoning by xAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.