Mellum2-12B-A2.5B-Instruct vs Muse Spark 1.1
Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
Muse Spark 1.1 leads for most workloads.
Based on BenchLM composite scores, July 2026.
Mellum2-12B-A2.5B-Instruct
46
Muse Spark 1.1
78
Pick Muse Spark 1.1 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.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | Mellum2-12B-A2.5B-Instruct | Δ | Muse Spark 1.1 |
|---|---|---|---|
| Coding | 37.2 | → 24.3 | 61.5 |
| Knowledge | 40.9 | → 21.2 | 62.1 |
| Agentic | — | — | 80.4 |
| Multimodal | — | — | 88.4 |
| Inst. Following | 75.8 | — | — |
Operational Comparison
Mellum2-12B-A2.5B-Instruct
Muse Spark 1.1
N/A
N/A
N/A
N/A
N/A
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128K
1M
Quick Verdict
Pick Muse Spark 1.1 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.
Muse Spark 1.1 is clearly ahead on the provisional aggregate, 78 to 46. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Muse Spark 1.1's sharpest advantage is in coding, where it averages 61.5 against 37.2.
Muse Spark 1.1 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. Muse Spark 1.1 gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Instruct.
Benchmark Deep Dive
Frequently Asked Questions (3)
Which is better, Mellum2-12B-A2.5B-Instruct or Muse Spark 1.1?
Muse Spark 1.1 is ahead on BenchLM's provisional leaderboard, 78 to 46.
Which is better for knowledge tasks, Mellum2-12B-A2.5B-Instruct or Muse Spark 1.1?
Muse Spark 1.1 has the edge for knowledge tasks in this comparison, averaging 62.1 versus 40.9. Mellum2-12B-A2.5B-Instruct stays close enough that the answer can still flip depending on your workload.
Which is better for coding, Mellum2-12B-A2.5B-Instruct or Muse Spark 1.1?
Muse Spark 1.1 has the edge for coding in this comparison, averaging 61.5 versus 37.2. Mellum2-12B-A2.5B-Instruct stays close enough that the answer can still flip depending on your workload.
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