# LFM2.5-2.6B vs Mellum2-12B-A2.5B-Instruct

> Side-by-side benchmark comparison for LFM2.5-2.6B and Mellum2-12B-A2.5B-Instruct across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/lfm2-5-2-6b-vs-mellum2-12b-a2-5b-instruct
- Last updated: September 18, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: LFM2.5-2.6B and Mellum2-12B-A2.5B-Instruct 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.

## Model Snapshot

| Property | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct |
|----------|----------|----------|
| Creator | LiquidAI | JetBrains |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 128K | 128K |
| Independent public score (not head-to-head) | 39.9 | null |
| Benchmarks Covered | 7 | 6 |
| Pricing (input/output) | $0.00 / $0.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: 37.2 (Estimated · #131/154)
- Mellum2-12B-A2.5B-Instruct public-lane score: 45.8 (Estimated · #83/154)

| Benchmark | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 56.9% | 44.2% | LFM2.5-2.6B |
| τ³-bench results | 5.7% | Coming soon | Coming soon |
| Claw-Eval | 62.9% | Coming soon | Coming soon |
| PinchBench | 68.2% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: 39.2 (Estimated · #125/154)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 59.4% | 37.2% | LFM2.5-2.6B |

### Reasoning

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: 24.9 (Unranked · 2 rankable rows)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: 37 (Estimated · #151/184)
- Mellum2-12B-A2.5B-Instruct public-lane score: 46.1 (Estimated · #106/184)

| Benchmark | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Redux | Coming soon | 78.1% | Coming soon |
| GPQA | Coming soon | 40.9% | Coming soon |
| GPQA-D | Coming soon | 40.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: 38.1 (#104/124)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 59.2% | Coming soon | Coming soon |
| IFEval | Coming soon | 75.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- LFM2.5-2.6B public-lane score: Coming soon
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | LFM2.5-2.6B | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 51.9% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between LFM2.5-2.6B and Mellum2-12B-A2.5B-Instruct?

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

- [LFM2.5-2.6B vs Mellum2-12B-A2.5B-Thinking](/compare/lfm2-5-2-6b-vs-mellum2-12b-a2-5b-thinking)
- [Mellum2-12B-A2.5B-Instruct vs Mellum2-12B-A2.5B-Thinking](/compare/mellum2-12b-a2-5b-instruct-vs-mellum2-12b-a2-5b-thinking)
- [LFM2.5-2.6B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-lfm2-5-2-6b)
- [Mellum2-12B-A2.5B-Instruct vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-mellum2-12b-a2-5b-instruct)

## Explore More

- [LFM2.5-2.6B profile](/models/lfm2-5-2-6b)
- [Mellum2-12B-A2.5B-Instruct profile](/models/mellum2-12b-a2-5b-instruct)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)