Claude 3.5 Sonnet vs Llama 3.1 405B

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 55 (3 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

Claude 3.5 Sonnet

63.5

Llama 3.1 405B

68.5

65
MMLU
70
65
GPQA
70
63
SuperGPQA
68
61
OpenBookQA
66

Coding

Llama 3.1 405B

Claude 3.5 Sonnet

57

Llama 3.1 405B

62

57
HumanEval
62

Mathematics

Llama 3.1 405B

Claude 3.5 Sonnet

64

Llama 3.1 405B

69

65
AIME 2023
70
67
AIME 2024
72
66
AIME 2025
71
61
HMMT Feb 2023
66
63
HMMT Feb 2024
68
62
HMMT Feb 2025
67
64
BRUMO 2025
69

Reasoning

Llama 3.1 405B

Claude 3.5 Sonnet

62

Llama 3.1 405B

67

63
SimpleQA
68
61
MuSR
66

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or Llama 3.1 405B?

Llama 3.1 405B scores higher overall with 58 vs 55, a difference of 3 points across all benchmarks.

Which is better for knowledge tasks, Claude 3.5 Sonnet or Llama 3.1 405B?

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 63.5.

Which is better for coding, Claude 3.5 Sonnet or Llama 3.1 405B?

Llama 3.1 405B leads in coding with an average score of 62 vs 57.

Which is better for math, Claude 3.5 Sonnet or Llama 3.1 405B?

Llama 3.1 405B leads in math with an average score of 69 vs 64.

Which is better for reasoning, Claude 3.5 Sonnet or Llama 3.1 405B?

Llama 3.1 405B leads in reasoning with an average score of 67 vs 62.