Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Grok 4.1 Fast is clearly ahead on the aggregate, 83 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 mathematics, where it averages 94.3 against 9.8. The single biggest benchmark swing on the page is AIME 2024, 98 to 9.8.
Pick Grok 4.1 Fast if you want the stronger benchmark profile. GPT-4.1 nano only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Grok 4.1 Fast
77.5
GPT-4.1 nano
65.2
Grok 4.1 Fast
94.3
GPT-4.1 nano
9.8
Grok 4.1 Fast
90
GPT-4.1 nano
83.2
Grok 4.1 Fast is ahead overall, 83 to 23. The biggest single separator in this matchup is AIME 2024, where the scores are 98 and 9.8.
Grok 4.1 Fast has the edge for knowledge tasks in this comparison, averaging 77.5 versus 65.2. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for math in this comparison, averaging 94.3 versus 9.8. Inside this category, AIME 2024 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 83.2. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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