Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemini 3.5 Flash
88
o1-pro
29
Verified leaderboard positions: Gemini 3.5 Flash #7 · o1-pro unranked
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. o1-pro only becomes the better choice if knowledge is the priority.
Knowledge
+21.0 difference
Gemini 3.5 Flash
o1-pro
$1.5 / $9
$150 / $600
284.2 t/s
N/A
18.55s
N/A
1M
200K
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. o1-pro only becomes the better choice if knowledge is the priority.
Gemini 3.5 Flash is clearly ahead on the provisional aggregate, 88 to 29. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
o1-pro is also the more expensive model on tokens at $150.00 input / $600.00 output per 1M tokens, versus $1.50 input / $9.00 output per 1M tokens for Gemini 3.5 Flash. That is roughly 66.7x on output cost alone. Gemini 3.5 Flash gives you the larger context window at 1M, compared with 200K for o1-pro.
Gemini 3.5 Flash is ahead on BenchLM's provisional leaderboard, 88 to 29. The biggest single separator in this matchup is GPQA, where the scores are 92.2% and 79%.
o1-pro has the edge for knowledge tasks in this comparison, averaging 79 versus 58. Inside this category, GPQA is the benchmark that creates the most daylight between them.
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