Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Composer 2.5
82
Gemini 3.5 Flash
88
Verified leaderboard positions: Composer 2.5 unranked · Gemini 3.5 Flash #7
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. Composer 2.5 only becomes the better choice if you want the cheaper token bill.
Agentic
+7.9 difference
Composer 2.5
Gemini 3.5 Flash
$0.5 / $2.5
$1.5 / $9
N/A
284.2 t/s
N/A
18.55s
200K
1M
Pick Gemini 3.5 Flash if you want the stronger benchmark profile. Composer 2.5 only becomes the better choice if you want the cheaper token bill.
Gemini 3.5 Flash is clearly ahead on the provisional aggregate, 88 to 82. 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 agentic, where it averages 77.2 against 69.3. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 69.3% to 76.2%.
Gemini 3.5 Flash is also the more expensive model on tokens at $1.50 input / $9.00 output per 1M tokens, versus $0.50 input / $2.50 output per 1M tokens for Composer 2.5. That is roughly 3.6x on output cost alone. Gemini 3.5 Flash gives you the larger context window at 1M, compared with 200K for Composer 2.5.
Gemini 3.5 Flash is ahead on BenchLM's provisional leaderboard, 88 to 82. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 69.3% and 76.2%.
Gemini 3.5 Flash has the edge for agentic tasks in this comparison, averaging 77.2 versus 69.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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