benchlm.ai

Kimi K2.5 (Reasoning) vs o3

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

Quick Verdict

Kimi K2.5 (Reasoning) wins overall with a score of 71 vs 67 (4 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

o3

CreatorOpenAI
TypeProprietary
Context200K
Score67

Knowledge

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

89

o3

85.3

92
MMLU
86
90
GPQA
87
88
SuperGPQA
85
86
OpenBookQA
83

Coding

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

84

o3

78

84
HumanEval
78

Mathematics

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

93

o3

87

94
AIME 2023
88
96
AIME 2024
90
95
AIME 2025
89
90
HMMT Feb 2023
84
92
HMMT Feb 2024
86
91
HMMT Feb 2025
85
93
BRUMO 2025
87

Reasoning

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

87

o3

83

88
SimpleQA
84
86
MuSR
82

Frequently Asked Questions

Which is better, Kimi K2.5 (Reasoning) or o3?

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 67, a difference of 4 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 (Reasoning) or o3?

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 85.3.

Which is better for coding, Kimi K2.5 (Reasoning) or o3?

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 78.

Which is better for math, Kimi K2.5 (Reasoning) or o3?

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 87.

Which is better for reasoning, Kimi K2.5 (Reasoning) or o3?

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 83.

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