Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Grok 4.1 Fast is clearly ahead on the aggregate, 76 to 38. 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 multimodal & grounded, where it averages 87.4 against 41.7. The single biggest benchmark swing on the page is MMMU-Pro, 91 to 39.
Grok 4.1 Fast gives you the larger context window at 1M, compared with 32K for LFM2-24B-A2B.
Pick Grok 4.1 Fast if you want the stronger benchmark profile. LFM2-24B-A2B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Grok 4.1 Fast
71
LFM2-24B-A2B
33.4
Grok 4.1 Fast
59.5
LFM2-24B-A2B
18
Grok 4.1 Fast
87.4
LFM2-24B-A2B
41.7
Grok 4.1 Fast
88.3
LFM2-24B-A2B
46.6
Grok 4.1 Fast
69.2
LFM2-24B-A2B
35.6
Grok 4.1 Fast
90
LFM2-24B-A2B
68
Grok 4.1 Fast
84.8
LFM2-24B-A2B
61.4
Grok 4.1 Fast
92.3
LFM2-24B-A2B
50.4
Grok 4.1 Fast is ahead overall, 76 to 38. The biggest single separator in this matchup is MMMU-Pro, where the scores are 91 and 39.
Grok 4.1 Fast has the edge for knowledge tasks in this comparison, averaging 69.2 versus 35.6. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for coding in this comparison, averaging 59.5 versus 18. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for math in this comparison, averaging 92.3 versus 50.4. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for reasoning in this comparison, averaging 88.3 versus 46.6. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for agentic tasks in this comparison, averaging 71 versus 33.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for multimodal and grounded tasks in this comparison, averaging 87.4 versus 41.7. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for instruction following in this comparison, averaging 90 versus 68. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for multilingual tasks in this comparison, averaging 84.8 versus 61.4. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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