GPT-5 (high) vs Nemotron Ultra 253B

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 40 (32 point difference).GPT-5 (high) wins 4 out of 4 categories.

Knowledge

GPT-5 (high)

GPT-5 (high)

90

Nemotron Ultra 253B

46.8

93
MMLU
49
91
GPQA
48
89
SuperGPQA
46
87
OpenBookQA
44

Coding

GPT-5 (high)

GPT-5 (high)

85

Nemotron Ultra 253B

41

85
HumanEval
41

Mathematics

GPT-5 (high)

GPT-5 (high)

94

Nemotron Ultra 253B

48

95
AIME 2023
49
97
AIME 2024
51
96
AIME 2025
50
91
HMMT Feb 2023
45
93
HMMT Feb 2024
47
92
HMMT Feb 2025
46
94
BRUMO 2025
48

Reasoning

GPT-5 (high)

GPT-5 (high)

88

Nemotron Ultra 253B

46

89
SimpleQA
47
87
MuSR
45

Frequently Asked Questions

Which is better, GPT-5 (high) or Nemotron Ultra 253B?

GPT-5 (high) scores higher overall with 72 vs 40, a difference of 32 points across all benchmarks.

Which is better for knowledge tasks, GPT-5 (high) or Nemotron Ultra 253B?

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 46.8.

Which is better for coding, GPT-5 (high) or Nemotron Ultra 253B?

GPT-5 (high) leads in coding with an average score of 85 vs 41.

Which is better for math, GPT-5 (high) or Nemotron Ultra 253B?

GPT-5 (high) leads in math with an average score of 94 vs 48.

Which is better for reasoning, GPT-5 (high) or Nemotron Ultra 253B?

GPT-5 (high) leads in reasoning with an average score of 88 vs 46.