benchlm.ai

Grok 4.1 Fast vs Z-1

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 43 (30 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Z-1

CreatorZ
TypeProprietary
Context128K
Score43

Knowledge

Grok 4.1 Fast

Grok 4.1 Fast

91

Z-1

49.8

94
MMLU
52
92
GPQA
51
90
SuperGPQA
49
88
OpenBookQA
47

Coding

Grok 4.1 Fast

Grok 4.1 Fast

86

Z-1

44

86
HumanEval
44

Mathematics

Grok 4.1 Fast

Grok 4.1 Fast

95

Z-1

51

96
AIME 2023
52
98
AIME 2024
54
97
AIME 2025
53
92
HMMT Feb 2023
48
94
HMMT Feb 2024
50
93
HMMT Feb 2025
49
95
BRUMO 2025
51

Reasoning

Grok 4.1 Fast

Grok 4.1 Fast

89

Z-1

49

90
SimpleQA
50
88
MuSR
48

Frequently Asked Questions

Which is better, Grok 4.1 Fast or Z-1?

Grok 4.1 Fast scores higher overall with 73 vs 43, a difference of 30 points across all benchmarks.

Which is better for knowledge tasks, Grok 4.1 Fast or Z-1?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 49.8.

Which is better for coding, Grok 4.1 Fast or Z-1?

Grok 4.1 Fast leads in coding with an average score of 86 vs 44.

Which is better for math, Grok 4.1 Fast or Z-1?

Grok 4.1 Fast leads in math with an average score of 95 vs 51.

Which is better for reasoning, Grok 4.1 Fast or Z-1?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 49.

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