benchlm.ai

Grok 4.1 Fast vs Nemotron Ultra 253B

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

Quick Verdict

Grok 4.1 Fast wins overall with a score of 73 vs 40 (33 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Nemotron Ultra 253B

CreatorNVIDIA
TypeOpen Weight
Context32K
Score40

Knowledge

Grok 4.1 Fast

Grok 4.1 Fast

91

Nemotron Ultra 253B

46.8

94
MMLU
49
92
GPQA
48
90
SuperGPQA
46
88
OpenBookQA
44

Coding

Grok 4.1 Fast

Grok 4.1 Fast

86

Nemotron Ultra 253B

41

86
HumanEval
41

Mathematics

Grok 4.1 Fast

Grok 4.1 Fast

95

Nemotron Ultra 253B

48

96
AIME 2023
49
98
AIME 2024
51
97
AIME 2025
50
92
HMMT Feb 2023
45
94
HMMT Feb 2024
47
93
HMMT Feb 2025
46
95
BRUMO 2025
48

Reasoning

Grok 4.1 Fast

Grok 4.1 Fast

89

Nemotron Ultra 253B

46

90
SimpleQA
47
88
MuSR
45

Frequently Asked Questions

Which is better, Grok 4.1 Fast or Nemotron Ultra 253B?

Grok 4.1 Fast scores higher overall with 73 vs 40, a difference of 33 points across all benchmarks.

Which is better for knowledge tasks, Grok 4.1 Fast or Nemotron Ultra 253B?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 46.8.

Which is better for coding, Grok 4.1 Fast or Nemotron Ultra 253B?

Grok 4.1 Fast leads in coding with an average score of 86 vs 41.

Which is better for math, Grok 4.1 Fast or Nemotron Ultra 253B?

Grok 4.1 Fast leads in math with an average score of 95 vs 48.

Which is better for reasoning, Grok 4.1 Fast or Nemotron Ultra 253B?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 46.

Related Comparisons

Grok 4.1 Fast vs GPT-5.4Grok 4.1 Fast vs Gemini 3.1 ProGrok 4.1 Fast vs Claude Opus 4.6Grok 4.1 Fast vs GPT-5.3 CodexGrok 4.1 Fast vs Grok 4.1Grok 4.1 Fast vs GPT-5.2