benchlm.ai

Claude Opus 4.5 vs Nemotron Ultra 253B

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

Quick Verdict

Claude Opus 4.5 wins overall with a score of 79 vs 40 (39 point difference).Claude Opus 4.5 wins 4 out of 4 categories.

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

Nemotron Ultra 253B

CreatorNVIDIA
TypeOpen Weight
Context32K
Score40

Knowledge

Claude Opus 4.5

Claude Opus 4.5

96

Nemotron Ultra 253B

46.8

99
MMLU
49
97
GPQA
48
95
SuperGPQA
46
93
OpenBookQA
44

Coding

Claude Opus 4.5

Claude Opus 4.5

91

Nemotron Ultra 253B

41

91
HumanEval
41

Mathematics

Claude Opus 4.5

Claude Opus 4.5

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

Claude Opus 4.5

Claude Opus 4.5

94

Nemotron Ultra 253B

46

95
SimpleQA
47
93
MuSR
45

Frequently Asked Questions

Which is better, Claude Opus 4.5 or Nemotron Ultra 253B?

Claude Opus 4.5 scores higher overall with 79 vs 40, a difference of 39 points across all benchmarks.

Which is better for knowledge tasks, Claude Opus 4.5 or Nemotron Ultra 253B?

Claude Opus 4.5 leads in knowledge tasks with an average score of 96 vs 46.8.

Which is better for coding, Claude Opus 4.5 or Nemotron Ultra 253B?

Claude Opus 4.5 leads in coding with an average score of 91 vs 41.

Which is better for math, Claude Opus 4.5 or Nemotron Ultra 253B?

Claude Opus 4.5 leads in math with an average score of 97.1 vs 48.

Which is better for reasoning, Claude Opus 4.5 or Nemotron Ultra 253B?

Claude Opus 4.5 leads in reasoning with an average score of 94 vs 46.

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