Model comparison
Mellum2-12B-A2.5B-Thinking vs Soofi S 30B-A3B
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use BenchLM's provisional ranking lane.
Evidence parity. Mellum2-12B-A2.5B-Thinking and Soofi S 30B-A3B share 2 comparable benchmark results. 1 of 8 categories are comparable. 4 results are unique to Mellum2-12B-A2.5B-Thinking; 6 to Soofi S 30B-A3B.
Updated July 15, 2026- Shared results
- 2
- Mellum2-12B-A2.5B-Thinking only
- 4
- Soofi S 30B-A3B only
- 6
- Comparable categories
- 1 / 8
Pick Mellum2-12B-A2.5B-Thinking if you want the stronger benchmark profile. Soofi S 30B-A3B only becomes the better choice if you need the larger 1M context window or you would rather avoid the extra latency and token burn of a reasoning model.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Mellum2-12B-A2.5B-Thinking is clearly ahead on the provisional aggregate, 51 to 45. 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 knowledge, where it averages 57.6 against 49.9. The single biggest benchmark swing on the page is GPQA, 57.6% to 43.4%.
Mellum2-12B-A2.5B-Thinking is the reasoning model in the pair, while Soofi S 30B-A3B 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. Soofi S 30B-A3B gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Thinking.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Mellum2-12B-A2.5B-Thinking | Δ | Soofi S 30B-A3B |
|---|---|---|---|
| Knowledge | Mellum2-12B-A2.5B-Thinking57.6 | Margin← 7.7 | Soofi S 30B-A3B49.9 |
| Inst. Following | Mellum2-12B-A2.5B-Thinking76.5 | MarginNo overlap | Soofi S 30B-A3BNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
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- Source ↗
GPQA
KnowledgeA 57.6%B 43.4%Winner: Mellum2-12B-A2.5B-ThinkingΔ 14.2GPQA: Mellum2-12B-A2.5B-Thinking scored 57.6%; Soofi S 30B-A3B scored 43.4%. Mellum2-12B-A2.5B-Thinking wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Mellum2-12B-A2.5B-Thinking | Soofi S 30B-A3B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Mellum2-12B-A2.5B-ThinkingNot available | Soofi S 30B-A3B$0 input / $0 output | A complete price comparison is not available. |
| Generation speedtokens per second | Mellum2-12B-A2.5B-ThinkingNot available | Soofi S 30B-A3BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Mellum2-12B-A2.5B-ThinkingNot available | Soofi S 30B-A3BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Mellum2-12B-A2.5B-Thinking128K | Soofi S 30B-A3B1M | Soofi S 30B-A3B lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Mellum2-12B-A2.5B-Thinking | Soofi S 30B-A3B | Result |
|---|---|---|---|
| BFCL v4Source | 45.6% | — | Not comparable |
Coding2 benchmarks
Reasoning2 benchmarks
KnowledgeMellum2-12B-A2.5B-Thinking wins5 benchmarks
Math1 benchmarks
| Benchmark | Mellum2-12B-A2.5B-Thinking | Soofi S 30B-A3B | Result |
|---|---|---|---|
| GSM8KSource | — | 86.1% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Mellum2-12B-A2.5B-Thinking | Soofi S 30B-A3B | Result |
|---|---|---|---|
| IFEvalSource | 76.5% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Mellum2-12B-A2.5B-Thinking or Soofi S 30B-A3B?
Mellum2-12B-A2.5B-Thinking is ahead on BenchLM's provisional leaderboard, 51 to 45. The biggest single separator in this matchup is GPQA, where the scores are 57.6% and 43.4%.
Which is better for knowledge tasks, Mellum2-12B-A2.5B-Thinking or Soofi S 30B-A3B?
Mellum2-12B-A2.5B-Thinking has the edge for knowledge tasks in this comparison, averaging 57.6 versus 49.9. Inside this category, GPQA is the benchmark that creates the most daylight between them.
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