Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Grok 4.1 Fast is clearly ahead on the aggregate, 83 to 43. 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 26.4. The single biggest benchmark swing on the page is AIME 2024, 98 to 26.4. GPT-4.1 does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
Pick Grok 4.1 Fast if you want the stronger benchmark profile. GPT-4.1 only becomes the better choice if knowledge is the priority.
Grok 4.1 Fast
77.5
GPT-4.1
78.3
Grok 4.1 Fast
69.3
GPT-4.1
54.6
Grok 4.1 Fast
94.3
GPT-4.1
26.4
Grok 4.1 Fast
90
GPT-4.1
87.4
Grok 4.1 Fast is ahead overall, 83 to 43. The biggest single separator in this matchup is AIME 2024, where the scores are 98 and 26.4.
GPT-4.1 has the edge for knowledge tasks in this comparison, averaging 78.3 versus 77.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for coding in this comparison, averaging 69.3 versus 54.6. 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 94.3 versus 26.4. 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 87.4. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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