Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Flash (Max)
75
Mellum2-12B-A2.5B-Instruct
27
Verified leaderboard positions: DeepSeek V4 Flash (Max) #18 · Mellum2-12B-A2.5B-Instruct unranked
Pick DeepSeek V4 Flash (Max) if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Instruct only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Coding
+36.5 difference
Knowledge
+19.1 difference
DeepSeek V4 Flash (Max)
Mellum2-12B-A2.5B-Instruct
$0.14 / $0.28
N/A
N/A
N/A
N/A
N/A
1M
128K
Pick DeepSeek V4 Flash (Max) if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Instruct only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
DeepSeek V4 Flash (Max) is clearly ahead on the provisional aggregate, 75 to 27. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
DeepSeek V4 Flash (Max)'s sharpest advantage is in coding, where it averages 73.7 against 37.2. The single biggest benchmark swing on the page is LiveCodeBench, 91.6% to 37.2%.
DeepSeek V4 Flash (Max) is the reasoning model in the pair, while Mellum2-12B-A2.5B-Instruct is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. DeepSeek V4 Flash (Max) gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Instruct.
DeepSeek V4 Flash (Max) is ahead on BenchLM's provisional leaderboard, 75 to 27. The biggest single separator in this matchup is LiveCodeBench, where the scores are 91.6% and 37.2%.
DeepSeek V4 Flash (Max) has the edge for knowledge tasks in this comparison, averaging 60 versus 40.9. Inside this category, GPQA is the benchmark that creates the most daylight between them.
DeepSeek V4 Flash (Max) has the edge for coding in this comparison, averaging 73.7 versus 37.2. Inside this category, LiveCodeBench is the benchmark that creates the most daylight between them.
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