# Mellum2-12B-A2.5B-Thinking vs ZAYA1-74B-Preview

> Side-by-side benchmark comparison for Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mellum2-12b-a2-5b-thinking-vs-zaya1-74b-preview
- Last updated: September 4, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- ZAYA1-74B-Preview has the larger published context window at 256K.

## Model Snapshot

| Property | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview |
|----------|----------|----------|
| Creator | JetBrains | Zyphra |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 256K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 6 | 7 |
| Pricing (input/output) | N/A | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Thinking public-lane score: 48.3 (Estimated · #76/151)
- ZAYA1-74B-Preview public-lane score: Coming soon

| Benchmark | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 45.6% | Coming soon | Coming soon |
| τ²-bench Airline | Coming soon | 56.1% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Thinking public-lane score: Coming soon
- ZAYA1-74B-Preview public-lane score: 49.1 (Estimated · #79/183)

| Benchmark | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 69.9% | 65.7% | Mellum2-12B-A2.5B-Thinking |
| SWE-bench Verified | Coming soon | 53.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Thinking public-lane score: 48.8 (Estimated · #96/181)
- ZAYA1-74B-Preview public-lane score: 46.6 (Estimated · #107/181)

| Benchmark | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Redux | 86.2% | Coming soon | Coming soon |
| GPQA | 57.6% | 57.3% | Mellum2-12B-A2.5B-Thinking |
| GPQA-D | 57.6% | 57.3% | Mellum2-12B-A2.5B-Thinking |
| MMLU-Pro | Coming soon | 68.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Thinking public-lane score: Coming soon
- ZAYA1-74B-Preview public-lane score: Coming soon

| Benchmark | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 76.5% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Mellum2-12B-A2.5B-Thinking public-lane score: Coming soon
- ZAYA1-74B-Preview public-lane score: 56.4 (Unranked · 1 rankable row)

| Benchmark | Mellum2-12B-A2.5B-Thinking | ZAYA1-74B-Preview | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 76.4% | Coming soon |

## FAQ

### Is there enough evidence to pick between Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview?

Not yet. The models share only 3 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-Thinking vs Mellum2-12B-A2.5B-Instruct](/compare/mellum2-12b-a2-5b-instruct-vs-mellum2-12b-a2-5b-thinking)
- [ZAYA1-74B-Preview vs Mellum2-12B-A2.5B-Instruct](/compare/mellum2-12b-a2-5b-instruct-vs-zaya1-74b-preview)
- [Mellum2-12B-A2.5B-Thinking vs ZAYA1-8B](/compare/mellum2-12b-a2-5b-thinking-vs-zaya1-8b)
- [ZAYA1-74B-Preview vs ZAYA1-8B](/compare/zaya1-74b-preview-vs-zaya1-8b)

## Explore More

- [Mellum2-12B-A2.5B-Thinking profile](/models/mellum2-12b-a2-5b-thinking)
- [ZAYA1-74B-Preview profile](/models/zaya1-74b-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)