Llama 3.1 405B vs GPT-4o mini

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

Llama 3.1 405B is clearly ahead on the aggregate, 65 to 43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Quick Verdict

Pick Llama 3.1 405B if you want the stronger benchmark profile. GPT-4o mini only becomes the better choice if coding is the priority.

Knowledge

GPT-4o mini

Llama 3.1 405B

58.7

GPT-4o mini

82

70
MMLU
82
70
GPQA
-
68
SuperGPQA
-
66
OpenBookQA
-
71
MMLU-Pro
-
7
HLE
-

Coding

GPT-4o mini

Llama 3.1 405B

48.3

GPT-4o mini

87.2

62
HumanEval
87.2
46
SWE-bench Verified
-
37
LiveCodeBench
-

Mathematics

Llama 3.1 405B
70
AIME 2023
-
72
AIME 2024
-
71
AIME 2025
-
66
HMMT Feb 2023
-
68
HMMT Feb 2024
-
67
HMMT Feb 2025
-
69
BRUMO 2025
-
82
MATH-500
-

Reasoning

Llama 3.1 405B
68
SimpleQA
-
66
MuSR
-
82
BBH
-

Instruction Following

Llama 3.1 405B
86
IFEval
-

Multilingual

GPT-4o mini

Llama 3.1 405B

84

GPT-4o mini

87

84
MGSM
87

Frequently Asked Questions

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

Llama 3.1 405B is ahead overall, 65 to 43. The biggest single separator in this matchup is HumanEval, where the scores are 62 and 87.2.

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

GPT-4o mini has the edge for knowledge tasks in this comparison, averaging 82 versus 58.7. Inside this category, MMLU is the benchmark that creates the most daylight between them.

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

GPT-4o mini has the edge for coding in this comparison, averaging 87.2 versus 48.3. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

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

GPT-4o mini has the edge for multilingual tasks in this comparison, averaging 87 versus 84. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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