Kimi K2 vs o4-mini (high)

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

Quick Verdict

o4-mini (high) wins overall with a score of 65 vs 23 (42 point difference).o4-mini (high) wins 4 out of 4 categories.

Knowledge

o4-mini (high)

Kimi K2

29.8

o4-mini (high)

80.5

32
MMLU
82
31
GPQA
82
29
SuperGPQA
80
27
OpenBookQA
78

Coding

o4-mini (high)

Kimi K2

24

o4-mini (high)

74

24
HumanEval
74

Mathematics

o4-mini (high)

Kimi K2

31

o4-mini (high)

82

32
AIME 2023
83
34
AIME 2024
85
33
AIME 2025
84
28
HMMT Feb 2023
79
30
HMMT Feb 2024
81
29
HMMT Feb 2025
80
31
BRUMO 2025
82

Reasoning

o4-mini (high)

Kimi K2

29

o4-mini (high)

79

30
SimpleQA
80
28
MuSR
78

Frequently Asked Questions

Which is better, Kimi K2 or o4-mini (high)?

o4-mini (high) scores higher overall with 65 vs 23, a difference of 42 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2 or o4-mini (high)?

o4-mini (high) leads in knowledge tasks with an average score of 80.5 vs 29.8.

Which is better for coding, Kimi K2 or o4-mini (high)?

o4-mini (high) leads in coding with an average score of 74 vs 24.

Which is better for math, Kimi K2 or o4-mini (high)?

o4-mini (high) leads in math with an average score of 82 vs 31.

Which is better for reasoning, Kimi K2 or o4-mini (high)?

o4-mini (high) leads in reasoning with an average score of 79 vs 29.