Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Mellum2-12B-A2.5B-Thinking
59
Muse Spark
81
Pick Muse Spark if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if coding is the priority.
Coding
+8.2 difference
Knowledge
+7.2 difference
Mellum2-12B-A2.5B-Thinking
Muse Spark
N/A
N/A
N/A
N/A
N/A
N/A
128K
262K
Pick Muse Spark if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if coding is the priority.
Muse Spark is clearly ahead on the provisional aggregate, 81 to 59. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Muse Spark gives you the larger context window at 262K, compared with 128K for Mellum2-12B-A2.5B-Thinking.
Muse Spark is ahead on BenchLM's provisional leaderboard, 81 to 59.
Mellum2-12B-A2.5B-Thinking has the edge for knowledge tasks in this comparison, averaging 57.6 versus 50.4. Inside this category, GPQA-D is the benchmark that creates the most daylight between them.
Mellum2-12B-A2.5B-Thinking has the edge for coding in this comparison, averaging 69.9 versus 61.7. Muse Spark stays close enough that the answer can still flip depending on your workload.
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