benchlm.ai

GPT-5 mini vs Nemotron Ultra 253B

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 40 (28 point difference).GPT-5 mini wins 4 out of 4 categories.

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Nemotron Ultra 253B

CreatorNVIDIA
TypeOpen Weight
Context32K
Score40

Knowledge

GPT-5 mini

GPT-5 mini

85

Nemotron Ultra 253B

46.8

88
MMLU
49
86
GPQA
48
84
SuperGPQA
46
82
OpenBookQA
44

Coding

GPT-5 mini

GPT-5 mini

80

Nemotron Ultra 253B

41

80
HumanEval
41

Mathematics

GPT-5 mini

GPT-5 mini

89

Nemotron Ultra 253B

48

90
AIME 2023
49
92
AIME 2024
51
91
AIME 2025
50
86
HMMT Feb 2023
45
88
HMMT Feb 2024
47
87
HMMT Feb 2025
46
89
BRUMO 2025
48

Reasoning

GPT-5 mini

GPT-5 mini

83

Nemotron Ultra 253B

46

84
SimpleQA
47
82
MuSR
45

Frequently Asked Questions

Which is better, GPT-5 mini or Nemotron Ultra 253B?

GPT-5 mini scores higher overall with 68 vs 40, a difference of 28 points across all benchmarks.

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

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 46.8.

Which is better for coding, GPT-5 mini or Nemotron Ultra 253B?

GPT-5 mini leads in coding with an average score of 80 vs 41.

Which is better for math, GPT-5 mini or Nemotron Ultra 253B?

GPT-5 mini leads in math with an average score of 89 vs 48.

Which is better for reasoning, GPT-5 mini or Nemotron Ultra 253B?

GPT-5 mini leads in reasoning with an average score of 83 vs 46.

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