benchlm.ai

GPT-5.1-Codex-Max vs Nemotron 3 Ultra 500B

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

Quick Verdict

GPT-5.1-Codex-Max wins overall with a score of 77 vs 60 (17 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Nemotron 3 Ultra 500B

CreatorNVIDIA
TypeOpen Weight
Context32K
Score60

Knowledge

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

95

Nemotron 3 Ultra 500B

71.8

98
MMLU
74
96
GPQA
73
94
SuperGPQA
71
92
OpenBookQA
69

Coding

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

94

Nemotron 3 Ultra 500B

66

94
HumanEval
66

Mathematics

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

97.1

Nemotron 3 Ultra 500B

73

99
AIME 2023
74
99
AIME 2024
76
98
AIME 2025
75
95
HMMT Feb 2023
70
97
HMMT Feb 2024
72
96
HMMT Feb 2025
71
96
BRUMO 2025
73

Reasoning

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

93

Nemotron 3 Ultra 500B

70

94
SimpleQA
71
92
MuSR
69

Frequently Asked Questions

Which is better, GPT-5.1-Codex-Max or Nemotron 3 Ultra 500B?

GPT-5.1-Codex-Max scores higher overall with 77 vs 60, a difference of 17 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1-Codex-Max or Nemotron 3 Ultra 500B?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 71.8.

Which is better for coding, GPT-5.1-Codex-Max or Nemotron 3 Ultra 500B?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 66.

Which is better for math, GPT-5.1-Codex-Max or Nemotron 3 Ultra 500B?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 73.

Which is better for reasoning, GPT-5.1-Codex-Max or Nemotron 3 Ultra 500B?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 70.

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