GPT-4o vs Kimi K2

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

Quick Verdict

GPT-4o wins overall with a score of 56 vs 23 (33 point difference).GPT-4o wins 4 out of 4 categories.

Knowledge

GPT-4o

GPT-4o

64.5

Kimi K2

29.8

66
MMLU
32
66
GPQA
31
64
SuperGPQA
29
62
OpenBookQA
27

Coding

GPT-4o

GPT-4o

58

Kimi K2

24

58
HumanEval
24

Mathematics

GPT-4o

GPT-4o

65

Kimi K2

31

66
AIME 2023
32
68
AIME 2024
34
67
AIME 2025
33
62
HMMT Feb 2023
28
64
HMMT Feb 2024
30
63
HMMT Feb 2025
29
65
BRUMO 2025
31

Reasoning

GPT-4o

GPT-4o

63

Kimi K2

29

64
SimpleQA
30
62
MuSR
28

Frequently Asked Questions

Which is better, GPT-4o or Kimi K2?

GPT-4o scores higher overall with 56 vs 23, a difference of 33 points across all benchmarks.

Which is better for knowledge tasks, GPT-4o or Kimi K2?

GPT-4o leads in knowledge tasks with an average score of 64.5 vs 29.8.

Which is better for coding, GPT-4o or Kimi K2?

GPT-4o leads in coding with an average score of 58 vs 24.

Which is better for math, GPT-4o or Kimi K2?

GPT-4o leads in math with an average score of 65 vs 31.

Which is better for reasoning, GPT-4o or Kimi K2?

GPT-4o leads in reasoning with an average score of 63 vs 29.