benchlm.ai

GPT-5 mini vs Kimi K2.5 (Reasoning)

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 68 (3 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

Knowledge

Kimi K2.5 (Reasoning)

GPT-5 mini

85

Kimi K2.5 (Reasoning)

89

88
MMLU
92
86
GPQA
90
84
SuperGPQA
88
82
OpenBookQA
86

Coding

Kimi K2.5 (Reasoning)

GPT-5 mini

80

Kimi K2.5 (Reasoning)

84

80
HumanEval
84

Mathematics

Kimi K2.5 (Reasoning)

GPT-5 mini

89

Kimi K2.5 (Reasoning)

93

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

Reasoning

Kimi K2.5 (Reasoning)

GPT-5 mini

83

Kimi K2.5 (Reasoning)

87

84
SimpleQA
88
82
MuSR
86

Frequently Asked Questions

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

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 68, a difference of 3 points across all benchmarks.

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

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 85.

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

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 80.

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

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 89.

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

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

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