Grok 4.1 Fast vs o4-mini (high)

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 65 (8 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Knowledge

Grok 4.1 Fast

Grok 4.1 Fast

91

o4-mini (high)

80.5

94
MMLU
82
92
GPQA
82
90
SuperGPQA
80
88
OpenBookQA
78

Coding

Grok 4.1 Fast

Grok 4.1 Fast

86

o4-mini (high)

74

86
HumanEval
74

Mathematics

Grok 4.1 Fast

Grok 4.1 Fast

95

o4-mini (high)

82

96
AIME 2023
83
98
AIME 2024
85
97
AIME 2025
84
92
HMMT Feb 2023
79
94
HMMT Feb 2024
81
93
HMMT Feb 2025
80
95
BRUMO 2025
82

Reasoning

Grok 4.1 Fast

Grok 4.1 Fast

89

o4-mini (high)

79

90
SimpleQA
80
88
MuSR
78

Frequently Asked Questions

Which is better, Grok 4.1 Fast or o4-mini (high)?

Grok 4.1 Fast scores higher overall with 73 vs 65, a difference of 8 points across all benchmarks.

Which is better for knowledge tasks, Grok 4.1 Fast or o4-mini (high)?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 80.5.

Which is better for coding, Grok 4.1 Fast or o4-mini (high)?

Grok 4.1 Fast leads in coding with an average score of 86 vs 74.

Which is better for math, Grok 4.1 Fast or o4-mini (high)?

Grok 4.1 Fast leads in math with an average score of 95 vs 82.

Which is better for reasoning, Grok 4.1 Fast or o4-mini (high)?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 79.