benchlm.ai

Llama 3.1 405B vs o4-mini (high)

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

Quick Verdict

o4-mini (high) wins overall with a score of 65 vs 58 (7 point difference).o4-mini (high) wins 4 out of 4 categories.

Llama 3.1 405B

CreatorMeta
TypeOpen Weight
Context128K
Score58

o4-mini (high)

CreatorOpenAI
TypeProprietary
Context200K
Score65

Knowledge

o4-mini (high)

Llama 3.1 405B

68.5

o4-mini (high)

80.5

70
MMLU
82
70
GPQA
82
68
SuperGPQA
80
66
OpenBookQA
78

Coding

o4-mini (high)

Llama 3.1 405B

62

o4-mini (high)

74

62
HumanEval
74

Mathematics

o4-mini (high)

Llama 3.1 405B

69

o4-mini (high)

82

70
AIME 2023
83
72
AIME 2024
85
71
AIME 2025
84
66
HMMT Feb 2023
79
68
HMMT Feb 2024
81
67
HMMT Feb 2025
80
69
BRUMO 2025
82

Reasoning

o4-mini (high)

Llama 3.1 405B

67

o4-mini (high)

79

68
SimpleQA
80
66
MuSR
78

Frequently Asked Questions

Which is better, Llama 3.1 405B or o4-mini (high)?

o4-mini (high) scores higher overall with 65 vs 58, a difference of 7 points across all benchmarks.

Which is better for knowledge tasks, Llama 3.1 405B or o4-mini (high)?

o4-mini (high) leads in knowledge tasks with an average score of 80.5 vs 68.5.

Which is better for coding, Llama 3.1 405B or o4-mini (high)?

o4-mini (high) leads in coding with an average score of 74 vs 62.

Which is better for math, Llama 3.1 405B or o4-mini (high)?

o4-mini (high) leads in math with an average score of 82 vs 69.

Which is better for reasoning, Llama 3.1 405B or o4-mini (high)?

o4-mini (high) leads in reasoning with an average score of 79 vs 67.

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