benchlm.ai

GPT-5 mini vs Kimi K2.5

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 62 (6 point difference).GPT-5 mini wins 4 out of 4 categories.

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Kimi K2.5

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score62

Knowledge

GPT-5 mini

GPT-5 mini

85

Kimi K2.5

74.8

88
MMLU
77
86
GPQA
76
84
SuperGPQA
74
82
OpenBookQA
72

Coding

GPT-5 mini

GPT-5 mini

80

Kimi K2.5

69

80
HumanEval
69

Mathematics

GPT-5 mini

GPT-5 mini

89

Kimi K2.5

76

90
AIME 2023
77
92
AIME 2024
79
91
AIME 2025
78
86
HMMT Feb 2023
73
88
HMMT Feb 2024
75
87
HMMT Feb 2025
74
89
BRUMO 2025
76

Reasoning

GPT-5 mini

GPT-5 mini

83

Kimi K2.5

73

84
SimpleQA
74
82
MuSR
72

Frequently Asked Questions

Which is better, GPT-5 mini or Kimi K2.5?

GPT-5 mini scores higher overall with 68 vs 62, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, GPT-5 mini or Kimi K2.5?

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 74.8.

Which is better for coding, GPT-5 mini or Kimi K2.5?

GPT-5 mini leads in coding with an average score of 80 vs 69.

Which is better for math, GPT-5 mini or Kimi K2.5?

GPT-5 mini leads in math with an average score of 89 vs 76.

Which is better for reasoning, GPT-5 mini or Kimi K2.5?

GPT-5 mini leads in reasoning with an average score of 83 vs 73.

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