Grok 4.1 Fast vs Qwen: Qwen3.5 397B A17B

Compare Grok 4.1 Fast by xAI against Qwen: Qwen3.5 397B A17B by Qwen, tested across 53 shared challenges. Updated April 2026.

Which is better, Grok 4.1 Fast or Qwen: Qwen3.5 397B A17B?

Grok 4.1 Fast and Qwen: Qwen3.5 397B A17B are both competitive models. Compare their real outputs side by side below.

Key Differences Between Grok 4.1 Fast and Qwen: Qwen3.5 397B A17B

Grok 4.1 Fast is made by xai while Qwen: Qwen3.5 397B A17B is from qwen.

Our Verdict
Grok 4.1 Fast
Grok 4.1 Fast
Qwen: Qwen3.5 397B A17B
Qwen: Qwen3.5 397B A17B

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

Qwen: Qwen3.5 397B A17B uses 22.8x more emoji

Grok 4.1 Fast
Qwen: Qwen3.5 397B A17B
67%Vocabulary54%
15wSentence Length14w
0.17Hedging0.39
4.7Bold6.9
3.7Lists4.2
0.00Emoji0.23
0.99Headings0.93
0.14Transitions0.17
Based on 24 + 23 text responses
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Grok 4.1 FastQwen: Qwen3.5 397B A17B

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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