# Mellum2-12B-A2.5B-Instruct vs Nemotron 3 Nano Omni 30B A3B

> Side-by-side benchmark comparison for Mellum2-12B-A2.5B-Instruct and Nemotron 3 Nano Omni 30B A3B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mellum2-12b-a2-5b-instruct-vs-nemotron-3-nano-omni-30b-a3b
- Last updated: September 4, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Mellum2-12B-A2.5B-Instruct and Nemotron 3 Nano Omni 30B A3B share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Nemotron 3 Nano Omni 30B A3B has the larger published context window at 256K.

## Model Snapshot

| Property | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B |
|----------|----------|----------|
| Creator | JetBrains | NVIDIA |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 256K |
| Independent public score (not head-to-head) | null | 43.97 |
| Benchmarks Covered | 6 | 16 |
| Pricing (input/output) | N/A | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: 47.8 (Estimated · #82/151)
- Nemotron 3 Nano Omni 30B A3B public-lane score: 47 (Estimated · #83/151)

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 44.2% | Coming soon | Coming soon |
| OSWorld | Coming soon | 47.4% | Coming soon |
| τ²-bench results | Coming soon | 45.3% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon
- Nemotron 3 Nano Omni 30B A3B public-lane score: 42.6 (Estimated · #129/183)

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 37.2% | Coming soon | Coming soon |
| LiveCodeBench v5 | Coming soon | 63.2% | Coming soon |
| SciCode | Coming soon | 32% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon
- Nemotron 3 Nano Omni 30B A3B public-lane score: 39.3 (#42/48)

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| MMMU | Coming soon | 70.8% | Coming soon |
| MMLongBench-Doc | Coming soon | 57.5% | Coming soon |
| CharXiv | Coming soon | 76.3% | Coming soon |
| ScreenSpot Pro | Coming soon | 57.8% | Coming soon |
| Video-MME (w/o subtitle) | Coming soon | 72.2% | Coming soon |
| AI2D_TEST | Coming soon | 88.5% | Coming soon |
| RefCOCO (avg) | Coming soon | 90.5% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon
- Nemotron 3 Nano Omni 30B A3B public-lane score: 50.3 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: 48.1 (Estimated · #103/181)
- Nemotron 3 Nano Omni 30B A3B public-lane score: 39.9 (Supported · #140/181)

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Redux | 78.1% | Coming soon | Coming soon |
| GPQA | 40.9% | 72.2% | Nemotron 3 Nano Omni 30B A3B |
| GPQA-D | 40.9% | 72.2% | Nemotron 3 Nano Omni 30B A3B |
| MMLU-Pro | Coming soon | 77.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon
- Nemotron 3 Nano Omni 30B A3B public-lane score: 75.9 (#57/120)

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 75.8% | Coming soon | Coming soon |
| IFBench | Coming soon | 74.2% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon
- Nemotron 3 Nano Omni 30B A3B public-lane score: Coming soon

| Benchmark | Mellum2-12B-A2.5B-Instruct | Nemotron 3 Nano Omni 30B A3B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 82.1% | Coming soon |

## FAQ

### Is there enough evidence to pick between Mellum2-12B-A2.5B-Instruct and Nemotron 3 Nano Omni 30B A3B?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Mellum2-12B-A2.5B-Instruct vs Mellum2-12B-A2.5B-Thinking](/compare/mellum2-12b-a2-5b-instruct-vs-mellum2-12b-a2-5b-thinking)
- [Nemotron 3 Nano Omni 30B A3B vs Mellum2-12B-A2.5B-Thinking](/compare/mellum2-12b-a2-5b-thinking-vs-nemotron-3-nano-omni-30b-a3b)
- [Mellum2-12B-A2.5B-Instruct vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-mellum2-12b-a2-5b-instruct)
- [Nemotron 3 Nano Omni 30B A3B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-nemotron-3-nano-omni-30b-a3b)

## Explore More

- [Mellum2-12B-A2.5B-Instruct profile](/models/mellum2-12b-a2-5b-instruct)
- [Nemotron 3 Nano Omni 30B A3B profile](/models/nemotron-3-nano-omni-30b-a3b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)