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Grok 4.1 Fast

xAI
39/ 57

Intelligence Score

Intelligence

39

#28 of 210 (top 13%)

Speed

113 tok/s

#62 of 148

Price

$0.28

per M tokens

#40 cheapest of 144

Context Window

2M

tokens

Latency: 9ms (#128)

Score Breakdown

Quality Score68%
Speed Score18%
Cost Score97%

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Use This Model

Claude Code

claude --model grok-4-1-fast-reasoning

API (cURL)

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -d '{
    "model": "grok-4-1-fast-reasoning",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Vercel AI SDK

import { generateText } from "ai";
import { openrouter } from "@openrouter/ai-sdk-provider";

const { text } = await generateText({
  model: openrouter("grok-4-1-fast-reasoning"),
  prompt: "Hello",
});
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