Head-to-head comparison across 4benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemini 3.5 Flash
88
Grok 4.3
76
Verified leaderboard positions: Gemini 3.5 Flash #7 · Grok 4.3 unranked
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. Grok 4.3 only becomes the better choice if instruction following is the priority or you want the cheaper token bill.
Coding
+7.2 difference
Knowledge
+4.1 difference
Multimodal
+5.7 difference
Inst. Following
+5.0 difference
Gemini 3.5 Flash
Grok 4.3
$1.5 / $9
$1.25 / $2.5
284.2 t/s
209 t/s
18.55s
12.36s
1M
1M
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. Grok 4.3 only becomes the better choice if instruction following is the priority or you want the cheaper token bill.
Gemini 3.5 Flash is clearly ahead on the provisional aggregate, 88 to 76. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3.5 Flash's sharpest advantage is in coding, where it averages 54.5 against 47.3. The single biggest benchmark swing on the page is SciCode, 53.1% to 47.3%. Grok 4.3 does hit back in instruction following, so the answer changes if that is the part of the workload you care about most.
Gemini 3.5 Flash is also the more expensive model on tokens at $1.50 input / $9.00 output per 1M tokens, versus $1.25 input / $2.50 output per 1M tokens for Grok 4.3. That is roughly 3.6x on output cost alone.
Gemini 3.5 Flash is ahead on BenchLM's provisional leaderboard, 88 to 76. The biggest single separator in this matchup is SciCode, where the scores are 53.1% and 47.3%.
Gemini 3.5 Flash has the edge for knowledge tasks in this comparison, averaging 58 versus 53.9. Inside this category, AA-Omniscience Accuracy is the benchmark that creates the most daylight between them.
Gemini 3.5 Flash has the edge for coding in this comparison, averaging 54.5 versus 47.3. Inside this category, SciCode is the benchmark that creates the most daylight between them.
Gemini 3.5 Flash has the edge for multimodal and grounded tasks in this comparison, averaging 83.8 versus 78.1. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Grok 4.3 has the edge for instruction following in this comparison, averaging 81.3 versus 76.3. Inside this category, IFBench is the benchmark that creates the most daylight between them.
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