Compare Grok 4.1 Fast by xAI against Kimi Linear 48B A3B Instruct by Moonshot AI, tested across 35 shared challenges. Updated April 2026.
Grok 4.1 Fast and Kimi Linear 48B A3B Instruct are both competitive models. Compare their real outputs side by side below.
Grok 4.1 Fast is made by xai while Kimi Linear 48B A3B Instruct is from moonshotai.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok 4.1 Fast uses 3.0x more transitions
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare Grok 4.1 Fast by xAI against Kimi Linear 48B A3B Instruct by Moonshot AI, tested across 35 shared challenges. Updated April 2026.
Grok 4.1 Fast and Kimi Linear 48B A3B Instruct are both competitive models. Compare their real outputs side by side below.
Grok 4.1 Fast is made by xai while Kimi Linear 48B A3B Instruct is from moonshotai.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok 4.1 Fast uses 3.0x more transitions
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

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35 fights queued
23+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy