Claude 3 Opus 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 51 (7 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

Claude 3 Opus

59.5

Llama 3.1 405B

68.5

61
MMLU
70
61
GPQA
70
59
SuperGPQA
68
57
OpenBookQA
66

Coding

Llama 3.1 405B

Claude 3 Opus

53

Llama 3.1 405B

62

53
HumanEval
62

Mathematics

Llama 3.1 405B

Claude 3 Opus

60

Llama 3.1 405B

69

61
AIME 2023
70
63
AIME 2024
72
62
AIME 2025
71
57
HMMT Feb 2023
66
59
HMMT Feb 2024
68
58
HMMT Feb 2025
67
60
BRUMO 2025
69

Reasoning

Llama 3.1 405B

Claude 3 Opus

58

Llama 3.1 405B

67

59
SimpleQA
68
57
MuSR
66

Frequently Asked Questions

Which is better, Claude 3 Opus or Llama 3.1 405B?

Llama 3.1 405B scores higher overall with 58 vs 51, a difference of 7 points across all benchmarks.

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

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 59.5.

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

Llama 3.1 405B leads in coding with an average score of 62 vs 53.

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

Llama 3.1 405B leads in math with an average score of 69 vs 60.

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

Llama 3.1 405B leads in reasoning with an average score of 67 vs 58.