Kimi K2.5 (Reasoning) vs Qwen3.5 397B (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 70 (1 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Knowledge

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

89

Qwen3.5 397B (Reasoning)

88

92
MMLU
91
90
GPQA
89
88
SuperGPQA
87
86
OpenBookQA
85

Coding

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

84

Qwen3.5 397B (Reasoning)

83

84
HumanEval
83

Mathematics

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

93

Qwen3.5 397B (Reasoning)

92

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

Reasoning

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

87

Qwen3.5 397B (Reasoning)

86

88
SimpleQA
87
86
MuSR
85

Frequently Asked Questions

Which is better, Kimi K2.5 (Reasoning) or Qwen3.5 397B (Reasoning)?

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 70, a difference of 1 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 (Reasoning) or Qwen3.5 397B (Reasoning)?

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 88.

Which is better for coding, Kimi K2.5 (Reasoning) or Qwen3.5 397B (Reasoning)?

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 83.

Which is better for math, Kimi K2.5 (Reasoning) or Qwen3.5 397B (Reasoning)?

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 92.

Which is better for reasoning, Kimi K2.5 (Reasoning) or Qwen3.5 397B (Reasoning)?

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 86.