Llama 3.1 405B vs DBRX Instruct

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

Llama 3.1 405B is clearly ahead on the aggregate, 65 to 32. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Llama 3.1 405B gives you the larger context window at 128K, compared with 32K for DBRX Instruct.

Quick Verdict

Pick Llama 3.1 405B if you want the stronger benchmark profile. DBRX Instruct only becomes the better choice if coding is the priority.

Knowledge

DBRX Instruct

Llama 3.1 405B

58.7

DBRX Instruct

73.7

70
MMLU
73.7
70
GPQA
-
68
SuperGPQA
-
66
OpenBookQA
-
71
MMLU-Pro
-
7
HLE
-

Coding

DBRX Instruct

Llama 3.1 405B

48.3

DBRX Instruct

70.1

62
HumanEval
70.1
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

Llama 3.1 405B
84
MGSM
-

Frequently Asked Questions

Which is better, Llama 3.1 405B or DBRX Instruct?

Llama 3.1 405B is ahead overall, 65 to 32. The biggest single separator in this matchup is HumanEval, where the scores are 62 and 70.1.

Which is better for knowledge tasks, Llama 3.1 405B or DBRX Instruct?

DBRX Instruct has the edge for knowledge tasks in this comparison, averaging 73.7 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 DBRX Instruct?

DBRX Instruct has the edge for coding in this comparison, averaging 70.1 versus 48.3. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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