Llama 3.1 405B vs Llama 4 Scout

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

Quick Verdict

Llama 3.1 405B wins overall with a score of 58 vs 38 (20 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

Llama 3.1 405B

68.5

Llama 4 Scout

44.8

70
MMLU
47
70
GPQA
46
68
SuperGPQA
44
66
OpenBookQA
42

Coding

Llama 3.1 405B

Llama 3.1 405B

62

Llama 4 Scout

39

62
HumanEval
39

Mathematics

Llama 3.1 405B

Llama 3.1 405B

69

Llama 4 Scout

46

70
AIME 2023
47
72
AIME 2024
49
71
AIME 2025
48
66
HMMT Feb 2023
43
68
HMMT Feb 2024
45
67
HMMT Feb 2025
44
69
BRUMO 2025
46

Reasoning

Llama 3.1 405B

Llama 3.1 405B

67

Llama 4 Scout

44

68
SimpleQA
45
66
MuSR
43

Frequently Asked Questions

Which is better, Llama 3.1 405B or Llama 4 Scout?

Llama 3.1 405B scores higher overall with 58 vs 38, a difference of 20 points across all benchmarks.

Which is better for knowledge tasks, Llama 3.1 405B or Llama 4 Scout?

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 44.8.

Which is better for coding, Llama 3.1 405B or Llama 4 Scout?

Llama 3.1 405B leads in coding with an average score of 62 vs 39.

Which is better for math, Llama 3.1 405B or Llama 4 Scout?

Llama 3.1 405B leads in math with an average score of 69 vs 46.

Which is better for reasoning, Llama 3.1 405B or Llama 4 Scout?

Llama 3.1 405B leads in reasoning with an average score of 67 vs 44.