Llama 3.1 405B vs Llama 3 70B

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 48 (10 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

Llama 3.1 405B

68.5

Llama 3 70B

56.5

70
MMLU
58
70
GPQA
58
68
SuperGPQA
56
66
OpenBookQA
54

Coding

Llama 3.1 405B

Llama 3.1 405B

62

Llama 3 70B

50

62
HumanEval
50

Mathematics

Llama 3.1 405B

Llama 3.1 405B

69

Llama 3 70B

57

70
AIME 2023
58
72
AIME 2024
60
71
AIME 2025
59
66
HMMT Feb 2023
54
68
HMMT Feb 2024
56
67
HMMT Feb 2025
55
69
BRUMO 2025
57

Reasoning

Llama 3.1 405B

Llama 3.1 405B

67

Llama 3 70B

55

68
SimpleQA
56
66
MuSR
54

Frequently Asked Questions

Which is better, Llama 3.1 405B or Llama 3 70B?

Llama 3.1 405B scores higher overall with 58 vs 48, a difference of 10 points across all benchmarks.

Which is better for knowledge tasks, Llama 3.1 405B or Llama 3 70B?

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 56.5.

Which is better for coding, Llama 3.1 405B or Llama 3 70B?

Llama 3.1 405B leads in coding with an average score of 62 vs 50.

Which is better for math, Llama 3.1 405B or Llama 3 70B?

Llama 3.1 405B leads in math with an average score of 69 vs 57.

Which is better for reasoning, Llama 3.1 405B or Llama 3 70B?

Llama 3.1 405B leads in reasoning with an average score of 67 vs 55.