Llama 3.1 405B vs Z-1

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 43 (15 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

Llama 3.1 405B

68.5

Z-1

49.8

70
MMLU
52
70
GPQA
51
68
SuperGPQA
49
66
OpenBookQA
47

Coding

Llama 3.1 405B

Llama 3.1 405B

62

Z-1

44

62
HumanEval
44

Mathematics

Llama 3.1 405B

Llama 3.1 405B

69

Z-1

51

70
AIME 2023
52
72
AIME 2024
54
71
AIME 2025
53
66
HMMT Feb 2023
48
68
HMMT Feb 2024
50
67
HMMT Feb 2025
49
69
BRUMO 2025
51

Reasoning

Llama 3.1 405B

Llama 3.1 405B

67

Z-1

49

68
SimpleQA
50
66
MuSR
48

Frequently Asked Questions

Which is better, Llama 3.1 405B or Z-1?

Llama 3.1 405B scores higher overall with 58 vs 43, a difference of 15 points across all benchmarks.

Which is better for knowledge tasks, Llama 3.1 405B or Z-1?

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 49.8.

Which is better for coding, Llama 3.1 405B or Z-1?

Llama 3.1 405B leads in coding with an average score of 62 vs 44.

Which is better for math, Llama 3.1 405B or Z-1?

Llama 3.1 405B leads in math with an average score of 69 vs 51.

Which is better for reasoning, Llama 3.1 405B or Z-1?

Llama 3.1 405B leads in reasoning with an average score of 67 vs 49.