Kimi K2.5 (Reasoning) vs Nemotron Ultra 253B

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 40 (31 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Knowledge

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

89

Nemotron Ultra 253B

46.8

92
MMLU
49
90
GPQA
48
88
SuperGPQA
46
86
OpenBookQA
44

Coding

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

84

Nemotron Ultra 253B

41

84
HumanEval
41

Mathematics

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

93

Nemotron Ultra 253B

48

94
AIME 2023
49
96
AIME 2024
51
95
AIME 2025
50
90
HMMT Feb 2023
45
92
HMMT Feb 2024
47
91
HMMT Feb 2025
46
93
BRUMO 2025
48

Reasoning

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

87

Nemotron Ultra 253B

46

88
SimpleQA
47
86
MuSR
45

Frequently Asked Questions

Which is better, Kimi K2.5 (Reasoning) or Nemotron Ultra 253B?

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 40, a difference of 31 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 (Reasoning) or Nemotron Ultra 253B?

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 46.8.

Which is better for coding, Kimi K2.5 (Reasoning) or Nemotron Ultra 253B?

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 41.

Which is better for math, Kimi K2.5 (Reasoning) or Nemotron Ultra 253B?

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 48.

Which is better for reasoning, Kimi K2.5 (Reasoning) or Nemotron Ultra 253B?

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 46.