GPT-4o 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 56 (2 point difference).Llama 3.1 405B wins 4 out of 4 categories.

Knowledge

Llama 3.1 405B

GPT-4o

64.5

Llama 3.1 405B

68.5

66
MMLU
70
66
GPQA
70
64
SuperGPQA
68
62
OpenBookQA
66

Coding

Llama 3.1 405B

GPT-4o

58

Llama 3.1 405B

62

58
HumanEval
62

Mathematics

Llama 3.1 405B

GPT-4o

65

Llama 3.1 405B

69

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

Reasoning

Llama 3.1 405B

GPT-4o

63

Llama 3.1 405B

67

64
SimpleQA
68
62
MuSR
66

Frequently Asked Questions

Which is better, GPT-4o or Llama 3.1 405B?

Llama 3.1 405B scores higher overall with 58 vs 56, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, GPT-4o or Llama 3.1 405B?

Llama 3.1 405B leads in knowledge tasks with an average score of 68.5 vs 64.5.

Which is better for coding, GPT-4o or Llama 3.1 405B?

Llama 3.1 405B leads in coding with an average score of 62 vs 58.

Which is better for math, GPT-4o or Llama 3.1 405B?

Llama 3.1 405B leads in math with an average score of 69 vs 65.

Which is better for reasoning, GPT-4o or Llama 3.1 405B?

Llama 3.1 405B leads in reasoning with an average score of 67 vs 63.