Nemotron Ultra 253B vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 40 (27 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Nemotron Ultra 253B

46.8

o3

85.3

49
MMLU
86
48
GPQA
87
46
SuperGPQA
85
44
OpenBookQA
83

Coding

o3

Nemotron Ultra 253B

41

o3

78

41
HumanEval
78

Mathematics

o3

Nemotron Ultra 253B

48

o3

87

49
AIME 2023
88
51
AIME 2024
90
50
AIME 2025
89
45
HMMT Feb 2023
84
47
HMMT Feb 2024
86
46
HMMT Feb 2025
85
48
BRUMO 2025
87

Reasoning

o3

Nemotron Ultra 253B

46

o3

83

47
SimpleQA
84
45
MuSR
82

Frequently Asked Questions

Which is better, Nemotron Ultra 253B or o3?

o3 scores higher overall with 67 vs 40, a difference of 27 points across all benchmarks.

Which is better for knowledge tasks, Nemotron Ultra 253B or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 46.8.

Which is better for coding, Nemotron Ultra 253B or o3?

o3 leads in coding with an average score of 78 vs 41.

Which is better for math, Nemotron Ultra 253B or o3?

o3 leads in math with an average score of 87 vs 48.

Which is better for reasoning, Nemotron Ultra 253B or o3?

o3 leads in reasoning with an average score of 83 vs 46.