GPT-5.1 vs Nemotron Ultra 253B

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

Quick Verdict

GPT-5.1 wins overall with a score of 76 vs 40 (36 point difference).GPT-5.1 wins 4 out of 4 categories.

Knowledge

GPT-5.1

GPT-5.1

94

Nemotron Ultra 253B

46.8

97
MMLU
49
95
GPQA
48
93
SuperGPQA
46
91
OpenBookQA
44

Coding

GPT-5.1

GPT-5.1

89

Nemotron Ultra 253B

41

89
HumanEval
41

Mathematics

GPT-5.1

GPT-5.1

97.1

Nemotron Ultra 253B

48

99
AIME 2023
49
99
AIME 2024
51
98
AIME 2025
50
95
HMMT Feb 2023
45
97
HMMT Feb 2024
47
96
HMMT Feb 2025
46
96
BRUMO 2025
48

Reasoning

GPT-5.1

GPT-5.1

92

Nemotron Ultra 253B

46

93
SimpleQA
47
91
MuSR
45

Frequently Asked Questions

Which is better, GPT-5.1 or Nemotron Ultra 253B?

GPT-5.1 scores higher overall with 76 vs 40, a difference of 36 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1 or Nemotron Ultra 253B?

GPT-5.1 leads in knowledge tasks with an average score of 94 vs 46.8.

Which is better for coding, GPT-5.1 or Nemotron Ultra 253B?

GPT-5.1 leads in coding with an average score of 89 vs 41.

Which is better for math, GPT-5.1 or Nemotron Ultra 253B?

GPT-5.1 leads in math with an average score of 97.1 vs 48.

Which is better for reasoning, GPT-5.1 or Nemotron Ultra 253B?

GPT-5.1 leads in reasoning with an average score of 92 vs 46.