benchlm.ai

GPT-5 mini vs Kimi K2

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 23 (45 point difference).GPT-5 mini wins 4 out of 4 categories.

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Kimi K2

CreatorMoonshot AI
TypeProprietary
Context128K
Score23

Knowledge

GPT-5 mini

GPT-5 mini

85

Kimi K2

29.8

88
MMLU
32
86
GPQA
31
84
SuperGPQA
29
82
OpenBookQA
27

Coding

GPT-5 mini

GPT-5 mini

80

Kimi K2

24

80
HumanEval
24

Mathematics

GPT-5 mini

GPT-5 mini

89

Kimi K2

31

90
AIME 2023
32
92
AIME 2024
34
91
AIME 2025
33
86
HMMT Feb 2023
28
88
HMMT Feb 2024
30
87
HMMT Feb 2025
29
89
BRUMO 2025
31

Reasoning

GPT-5 mini

GPT-5 mini

83

Kimi K2

29

84
SimpleQA
30
82
MuSR
28

Frequently Asked Questions

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

GPT-5 mini scores higher overall with 68 vs 23, a difference of 45 points across all benchmarks.

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

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 29.8.

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

GPT-5 mini leads in coding with an average score of 80 vs 24.

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

GPT-5 mini leads in math with an average score of 89 vs 31.

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

GPT-5 mini leads in reasoning with an average score of 83 vs 29.

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