Llama 3.1 405B vs Qwen3.5 397B (Reasoning)

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

Quick Verdict

Qwen3.5 397B (Reasoning) wins overall with a score of 70 vs 58 (12 point difference).Qwen3.5 397B (Reasoning) wins 4 out of 4 categories.

Knowledge

Qwen3.5 397B (Reasoning)

Llama 3.1 405B

68.5

Qwen3.5 397B (Reasoning)

88

70
MMLU
91
70
GPQA
89
68
SuperGPQA
87
66
OpenBookQA
85

Coding

Qwen3.5 397B (Reasoning)

Llama 3.1 405B

62

Qwen3.5 397B (Reasoning)

83

62
HumanEval
83

Mathematics

Qwen3.5 397B (Reasoning)

Llama 3.1 405B

69

Qwen3.5 397B (Reasoning)

92

70
AIME 2023
93
72
AIME 2024
95
71
AIME 2025
94
66
HMMT Feb 2023
89
68
HMMT Feb 2024
91
67
HMMT Feb 2025
90
69
BRUMO 2025
92

Reasoning

Qwen3.5 397B (Reasoning)

Llama 3.1 405B

67

Qwen3.5 397B (Reasoning)

86

68
SimpleQA
87
66
MuSR
85

Frequently Asked Questions

Which is better, Llama 3.1 405B or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) scores higher overall with 70 vs 58, a difference of 12 points across all benchmarks.

Which is better for knowledge tasks, Llama 3.1 405B or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) leads in knowledge tasks with an average score of 88 vs 68.5.

Which is better for coding, Llama 3.1 405B or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) leads in coding with an average score of 83 vs 62.

Which is better for math, Llama 3.1 405B or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) leads in math with an average score of 92 vs 69.

Which is better for reasoning, Llama 3.1 405B or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) leads in reasoning with an average score of 86 vs 67.