Grok 3 Mini vs Grok 4.1 Fast

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

Grok 4.1 Fast is clearly ahead on the aggregate, 48 to 23. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Grok 4.1 Fast's sharpest advantage is in reasoning, where it averages 88.9 against 21.7. The single biggest benchmark swing on the page is SimpleQA, 21.7% to 90%.

Grok 4.1 Fast gives you the larger context window at 1M, compared with 128K for Grok 3 Mini.

Quick Verdict

Pick Grok 4.1 Fast if you want the stronger benchmark profile. Grok 3 Mini only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Agentic

Coming soon

Benchmark data for this category is coming soon.

Coding

Grok 4.1 Fast

Grok 3 Mini

41.5

Grok 4.1 Fast

86

41.5%
LiveCodeBench
Coming soon
Coming soon
HumanEval
86%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Grok 4.1 Fast

Grok 3 Mini

21.7

Grok 4.1 Fast

88.9

21.7%
SimpleQA
90%
Coming soon
MuSR
88%

Knowledge

Grok 4.1 Fast

Grok 3 Mini

74.1

Grok 4.1 Fast

91

66.2%
GPQA
92%
78.9%
MMLU-Pro
Coming soon
Coming soon
MMLU
94%
Coming soon
SuperGPQA
90%
Coming soon
OpenBookQA
88%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Grok 4.1 Fast

Grok 3 Mini

39.7

Grok 4.1 Fast

95

39.7%
AIME 2024
98%
Coming soon
AIME 2023
96%
Coming soon
AIME 2025
97%
Coming soon
HMMT Feb 2023
92%
Coming soon
HMMT Feb 2024
94%
Coming soon
HMMT Feb 2025
93%
Coming soon
BRUMO 2025
95%

Frequently Asked Questions

Which is better, Grok 3 Mini or Grok 4.1 Fast?

Grok 4.1 Fast is ahead overall, 48 to 23. The biggest single separator in this matchup is SimpleQA, where the scores are 21.7% and 90%.

Which is better for knowledge tasks, Grok 3 Mini or Grok 4.1 Fast?

Grok 4.1 Fast has the edge for knowledge tasks in this comparison, averaging 91 versus 74.1. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, Grok 3 Mini or Grok 4.1 Fast?

Grok 4.1 Fast has the edge for coding in this comparison, averaging 86 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 Grok 4.1 Fast?

Grok 4.1 Fast has the edge for math in this comparison, averaging 95 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 Grok 4.1 Fast?

Grok 4.1 Fast has the edge for reasoning in this comparison, averaging 88.9 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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