Model comparison
Interfaze Beta vs Mellum2-12B-A2.5B-Instruct
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Interfaze Beta and Mellum2-12B-A2.5B-Instruct share 2 comparable benchmark results. 1 of 8 categories are comparable. 8 results are unique to Interfaze Beta; 3 to Mellum2-12B-A2.5B-Instruct.
Updated July 23, 2026- Shared results
- 2
- Interfaze Beta only
- 8
- Mellum2-12B-A2.5B-Instruct only
- 3
- Comparable categories
- 1 / 8
Treat this as a split decision. Interfaze Beta makes more sense if knowledge is the priority or you need the larger 1M context window; Mellum2-12B-A2.5B-Instruct is the better fit if 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
Interfaze Beta and Mellum2-12B-A2.5B-Instruct finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Interfaze Beta 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. Interfaze Beta gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Instruct.
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 | Interfaze Beta | Δ | Mellum2-12B-A2.5B-Instruct |
|---|---|---|---|
| Knowledge | Interfaze Beta89.9 | Margin← 49.0 | Mellum2-12B-A2.5B-Instruct40.9 |
| Multimodal | Interfaze Beta71.1 | MarginNo overlap | Mellum2-12B-A2.5B-InstructNot measured |
| Inst. Following | Interfaze BetaNot measured | MarginNo overlap | Mellum2-12B-A2.5B-Instruct75.8 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 89.9%B 40.9%Winner: Interfaze BetaΔ 49GPQA: Interfaze Beta scored 89.9%; Mellum2-12B-A2.5B-Instruct scored 40.9%. Interfaze Beta wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Interfaze Beta | Mellum2-12B-A2.5B-Instruct | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Interfaze Beta$1.5 input / $3.5 output | Mellum2-12B-A2.5B-InstructNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Interfaze BetaNot available | Mellum2-12B-A2.5B-InstructNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Interfaze BetaNot available | Mellum2-12B-A2.5B-InstructNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Interfaze Beta1M | Mellum2-12B-A2.5B-Instruct128K | Interfaze Beta lists the larger context window. |
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, Interfaze Beta or Mellum2-12B-A2.5B-Instruct?
Interfaze Beta and Mellum2-12B-A2.5B-Instruct are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for knowledge tasks, Interfaze Beta or Mellum2-12B-A2.5B-Instruct?
Interfaze Beta has the edge for knowledge tasks in this comparison, averaging 89.9 versus 40.9. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Related Comparisons
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.