benchlm.ai

Grok 4.1 Fast vs Kimi K2

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

Grok 4.1 Fast wins overall with a score of 73 vs 23 (50 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Kimi K2

CreatorMoonshot AI
TypeProprietary
Context128K
Score23

Knowledge

Grok 4.1 Fast

Grok 4.1 Fast

91

Kimi K2

29.8

94
MMLU
32
92
GPQA
31
90
SuperGPQA
29
88
OpenBookQA
27

Coding

Grok 4.1 Fast

Grok 4.1 Fast

86

Kimi K2

24

86
HumanEval
24

Mathematics

Grok 4.1 Fast

Grok 4.1 Fast

95

Kimi K2

31

96
AIME 2023
32
98
AIME 2024
34
97
AIME 2025
33
92
HMMT Feb 2023
28
94
HMMT Feb 2024
30
93
HMMT Feb 2025
29
95
BRUMO 2025
31

Reasoning

Grok 4.1 Fast

Grok 4.1 Fast

89

Kimi K2

29

90
SimpleQA
30
88
MuSR
28

Frequently Asked Questions

Which is better, Grok 4.1 Fast or Kimi K2?

Grok 4.1 Fast scores higher overall with 73 vs 23, a difference of 50 points across all benchmarks.

Which is better for knowledge tasks, Grok 4.1 Fast or Kimi K2?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 29.8.

Which is better for coding, Grok 4.1 Fast or Kimi K2?

Grok 4.1 Fast leads in coding with an average score of 86 vs 24.

Which is better for math, Grok 4.1 Fast or Kimi K2?

Grok 4.1 Fast leads in math with an average score of 95 vs 31.

Which is better for reasoning, Grok 4.1 Fast or Kimi K2?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 29.

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