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 multilingual, where it averages 88 against 87. The single biggest benchmark swing on the page is MMLU, 94 to 82. GPT-4o mini does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Grok 4.1 Fast gives you the larger context window at 1M, compared with 128K for GPT-4o mini.
Pick Grok 4.1 Fast if you want the stronger benchmark profile. GPT-4o mini only becomes the better choice if coding is the priority.
Grok 4.1 Fast
77.5
GPT-4o mini
82
Grok 4.1 Fast
69.3
GPT-4o mini
87.2
Grok 4.1 Fast
88
GPT-4o mini
87
Grok 4.1 Fast is ahead overall, 83 to 43. The biggest single separator in this matchup is MMLU, where the scores are 94 and 82.
GPT-4o mini has the edge for knowledge tasks in this comparison, averaging 82 versus 77.5. Inside this category, MMLU is the benchmark that creates the most daylight between them.
GPT-4o mini has the edge for coding in this comparison, averaging 87.2 versus 69.3. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for multilingual tasks in this comparison, averaging 88 versus 87. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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