Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Composer 2.5
82
DeepSeek V4 Flash (Max)
75
Verified leaderboard positions: Composer 2.5 unranked · DeepSeek V4 Flash (Max) #15
Pick Composer 2.5 if you want the stronger benchmark profile. DeepSeek V4 Flash (Max) only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.
Agentic
+6.0 difference
Composer 2.5
DeepSeek V4 Flash (Max)
$0.5 / $2.5
$0.14 / $0.28
N/A
N/A
N/A
N/A
200K
1M
Pick Composer 2.5 if you want the stronger benchmark profile. DeepSeek V4 Flash (Max) only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.
Composer 2.5 is clearly ahead on the provisional aggregate, 82 to 75. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Composer 2.5's sharpest advantage is in agentic, where it averages 69.3 against 63.3. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 69.3% to 56.9%.
Composer 2.5 is also the more expensive model on tokens at $0.50 input / $2.50 output per 1M tokens, versus $0.14 input / $0.28 output per 1M tokens for DeepSeek V4 Flash (Max). That is roughly 8.9x on output cost alone. DeepSeek V4 Flash (Max) gives you the larger context window at 1M, compared with 200K for Composer 2.5.
Composer 2.5 is ahead on BenchLM's provisional leaderboard, 82 to 75. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 69.3% and 56.9%.
Composer 2.5 has the edge for agentic tasks in this comparison, averaging 69.3 versus 63.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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