Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Grok Code Fast 1
39
Mellum2-12B-A2.5B-Instruct
27
Pick Grok Code Fast 1 if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Instruct only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Coding
+33.6 difference
Grok Code Fast 1
Mellum2-12B-A2.5B-Instruct
$0.2 / $1.5
N/A
172 t/s
N/A
2.81s
N/A
256K
128K
Pick Grok Code Fast 1 if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Instruct only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Grok Code Fast 1 is clearly ahead on the provisional aggregate, 39 to 27. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok Code Fast 1's sharpest advantage is in coding, where it averages 70.8 against 37.2.
Grok Code Fast 1 gives you the larger context window at 256K, compared with 128K for Mellum2-12B-A2.5B-Instruct.
Grok Code Fast 1 is ahead on BenchLM's provisional leaderboard, 39 to 27.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 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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