# Laguna S 2.1 vs Mellum2-12B-A2.5B-Instruct

> Side-by-side benchmark comparison for Laguna S 2.1 and Mellum2-12B-A2.5B-Instruct across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/laguna-s-2-1-vs-mellum2-12b-a2-5b-instruct
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Laguna S 2.1 and Mellum2-12B-A2.5B-Instruct.

## Summary

- Laguna S 2.1 and Mellum2-12B-A2.5B-Instruct do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Laguna S 2.1 | Mellum2-12B-A2.5B-Instruct |
|----------|----------|----------|
| Creator | Poolside | JetBrains |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 128K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 6 | 6 |
| Pricing (input/output) | $0.10 / $0.20 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: 48.2 (Estimated · #77/151)
- Mellum2-12B-A2.5B-Instruct public-lane score: 47.8 (Estimated · #82/151)

| Benchmark | Laguna S 2.1 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 70.2% | Coming soon | Coming soon |
| Toolathlon-Verified | 49.7% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 44.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: 47.8 (Estimated · #87/183)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | Laguna S 2.1 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 70.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.5% | Coming soon | Coming soon |
| SWE-bench Pro | 59.4% | Coming soon | Coming soon |
| deepSwe | 40.4% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 37.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: Coming soon
- Mellum2-12B-A2.5B-Instruct public-lane score: 48.1 (Estimated · #103/181)

| Benchmark | Laguna S 2.1 | 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
- Laguna S 2.1 public-lane score: Coming soon
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | Laguna S 2.1 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 75.8% | Coming soon |

## FAQ

### Can I compare Laguna S 2.1 and Mellum2-12B-A2.5B-Instruct on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Laguna S 2.1 vs Laguna M.1](/compare/laguna-m-1-vs-laguna-s-2-1)
- [Mellum2-12B-A2.5B-Instruct vs Laguna M.1](/compare/laguna-m-1-vs-mellum2-12b-a2-5b-instruct)
- [Laguna S 2.1 vs Laguna XS.2](/compare/laguna-s-2-1-vs-laguna-xs-2)
- [Mellum2-12B-A2.5B-Instruct vs Laguna XS.2](/compare/laguna-xs-2-vs-mellum2-12b-a2-5b-instruct)

## Explore More

- [Laguna S 2.1 profile](/models/laguna-s-2-1)
- [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)