Grok 3 Mini vs Llama 3.1 405B

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

Llama 3.1 405B is clearly ahead on the aggregate, 38 to 23. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Llama 3.1 405B's sharpest advantage is in reasoning, where it averages 66.9 against 21.7. The single biggest benchmark swing on the page is SimpleQA, 21.7% to 68%. Grok 3 Mini does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

Quick Verdict

Pick Llama 3.1 405B if you want the stronger benchmark profile. Grok 3 Mini only becomes the better choice if knowledge is the priority.

Agentic

Coming soon

Benchmark data for this category is coming soon.

Coding

Llama 3.1 405B

Grok 3 Mini

41.5

Llama 3.1 405B

81.7

41.5%
LiveCodeBench
Coming soon
Coming soon
HumanEval
81.7%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Llama 3.1 405B

Grok 3 Mini

21.7

Llama 3.1 405B

66.9

21.7%
SimpleQA
68%
Coming soon
MuSR
66%

Knowledge

Grok 3 Mini

Grok 3 Mini

74.1

Llama 3.1 405B

57.3

66.2%
GPQA
39.5%
78.9%
MMLU-Pro
61.6%
Coming soon
MMLU
85.2%
Coming soon
SuperGPQA
68%
Coming soon
OpenBookQA
66%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Llama 3.1 405B

Grok 3 Mini

39.7

Llama 3.1 405B

69

39.7%
AIME 2024
72%
Coming soon
AIME 2023
70%
Coming soon
AIME 2025
71%
Coming soon
HMMT Feb 2023
66%
Coming soon
HMMT Feb 2024
68%
Coming soon
HMMT Feb 2025
67%
Coming soon
BRUMO 2025
69%

Frequently Asked Questions

Which is better, Grok 3 Mini or Llama 3.1 405B?

Llama 3.1 405B is ahead overall, 38 to 23. The biggest single separator in this matchup is SimpleQA, where the scores are 21.7% and 68%.

Which is better for knowledge tasks, Grok 3 Mini or Llama 3.1 405B?

Grok 3 Mini has the edge for knowledge tasks in this comparison, averaging 74.1 versus 57.3. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, Grok 3 Mini or Llama 3.1 405B?

Llama 3.1 405B has the edge for coding in this comparison, averaging 81.7 versus 41.5. Grok 3 Mini stays close enough that the answer can still flip depending on your workload.

Which is better for math, Grok 3 Mini or Llama 3.1 405B?

Llama 3.1 405B has the edge for math in this comparison, averaging 69 versus 39.7. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Grok 3 Mini or Llama 3.1 405B?

Llama 3.1 405B has the edge for reasoning in this comparison, averaging 66.9 versus 21.7. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Last updated: March 17, 2026

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