benchlm.ai

Kimi K2.5 vs o1-preview

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

Quick Verdict

o1-preview wins overall with a score of 71 vs 62 (9 point difference).o1-preview wins 4 out of 4 categories.

Kimi K2.5

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score62

o1-preview

CreatorOpenAI
TypeProprietary
Context200K
Score71

Knowledge

o1-preview

Kimi K2.5

74.8

o1-preview

89

77
MMLU
92
76
GPQA
90
74
SuperGPQA
88
72
OpenBookQA
86

Coding

o1-preview

Kimi K2.5

69

o1-preview

86

69
HumanEval
86

Mathematics

o1-preview

Kimi K2.5

76

o1-preview

93

77
AIME 2023
94
79
AIME 2024
96
78
AIME 2025
95
73
HMMT Feb 2023
90
75
HMMT Feb 2024
92
74
HMMT Feb 2025
91
76
BRUMO 2025
93

Reasoning

o1-preview

Kimi K2.5

73

o1-preview

87

74
SimpleQA
88
72
MuSR
86

Frequently Asked Questions

Which is better, Kimi K2.5 or o1-preview?

o1-preview scores higher overall with 71 vs 62, a difference of 9 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 or o1-preview?

o1-preview leads in knowledge tasks with an average score of 89 vs 74.8.

Which is better for coding, Kimi K2.5 or o1-preview?

o1-preview leads in coding with an average score of 86 vs 69.

Which is better for math, Kimi K2.5 or o1-preview?

o1-preview leads in math with an average score of 93 vs 76.

Which is better for reasoning, Kimi K2.5 or o1-preview?

o1-preview leads in reasoning with an average score of 87 vs 73.

Related Comparisons

Kimi K2.5 vs GPT-5.4Kimi K2.5 vs Gemini 3.1 ProKimi K2.5 vs Claude Opus 4.6Kimi K2.5 vs GPT-5.3 CodexKimi K2.5 vs Grok 4.1Kimi K2.5 vs GPT-5.2