Kimi K2.5 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 62 (3 point difference).o4-mini (high) wins 4 out of 4 categories.

Knowledge

o4-mini (high)

Kimi K2.5

74.8

o4-mini (high)

80.5

77
MMLU
82
76
GPQA
82
74
SuperGPQA
80
72
OpenBookQA
78

Coding

o4-mini (high)

Kimi K2.5

69

o4-mini (high)

74

69
HumanEval
74

Mathematics

o4-mini (high)

Kimi K2.5

76

o4-mini (high)

82

77
AIME 2023
83
79
AIME 2024
85
78
AIME 2025
84
73
HMMT Feb 2023
79
75
HMMT Feb 2024
81
74
HMMT Feb 2025
80
76
BRUMO 2025
82

Reasoning

o4-mini (high)

Kimi K2.5

73

o4-mini (high)

79

74
SimpleQA
80
72
MuSR
78

Frequently Asked Questions

Which is better, Kimi K2.5 or o4-mini (high)?

o4-mini (high) scores higher overall with 65 vs 62, a difference of 3 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 or o4-mini (high)?

o4-mini (high) leads in knowledge tasks with an average score of 80.5 vs 74.8.

Which is better for coding, Kimi K2.5 or o4-mini (high)?

o4-mini (high) leads in coding with an average score of 74 vs 69.

Which is better for math, Kimi K2.5 or o4-mini (high)?

o4-mini (high) leads in math with an average score of 82 vs 76.

Which is better for reasoning, Kimi K2.5 or o4-mini (high)?

o4-mini (high) leads in reasoning with an average score of 79 vs 73.