Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Mellum2-12B-A2.5B-Thinking
58
Ornith-1.0-9B
52
Pick Mellum2-12B-A2.5B-Thinking if you want the stronger benchmark profile. Ornith-1.0-9B only becomes the better choice if you need the larger 262K context window.
Coding
+0.5 difference
Mellum2-12B-A2.5B-Thinking
Ornith-1.0-9B
N/A
$0 / $0
N/A
N/A
N/A
N/A
128K
262K
Pick Mellum2-12B-A2.5B-Thinking if you want the stronger benchmark profile. Ornith-1.0-9B only becomes the better choice if you need the larger 262K context window.
Mellum2-12B-A2.5B-Thinking is clearly ahead on the provisional aggregate, 58 to 52. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Mellum2-12B-A2.5B-Thinking's sharpest advantage is in coding, where it averages 69.9 against 69.4.
Ornith-1.0-9B gives you the larger context window at 262K, compared with 128K for Mellum2-12B-A2.5B-Thinking.
Mellum2-12B-A2.5B-Thinking is ahead on BenchLM's provisional leaderboard, 58 to 52.
Mellum2-12B-A2.5B-Thinking has the edge for coding in this comparison, averaging 69.9 versus 69.4. Ornith-1.0-9B stays close enough that the answer can still flip depending on your workload.
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