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Model comparison

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

Data verified

Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.

N/A
No comparison
N/A
0 category wins1 category wins

Evidence parity. Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview share 2 comparable benchmark results. 1 of 8 categories are comparable. 3 results are unique to Mellum2-12B-A2.5B-Thinking; 5 to ZAYA1-74B-Preview.

Updated July 23, 2026
Shared results
2
Mellum2-12B-A2.5B-Thinking only
3
ZAYA1-74B-Preview only
5
Comparable categories
1 / 8

Treat this as a split decision. Mellum2-12B-A2.5B-Thinking makes more sense if its workflow fits your team better; ZAYA1-74B-Preview is the better fit if knowledge is the priority or you need the larger 256K context window.

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

Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview 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.

ZAYA1-74B-Preview gives you the larger context window at 256K, compared with 128K for Mellum2-12B-A2.5B-Thinking.

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 scores and score margins for Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview
CategoryMellum2-12B-A2.5B-ThinkingΔZAYA1-74B-Preview
KnowledgeMellum2-12B-A2.5B-Thinking57.6Margin→ 8.5ZAYA1-74B-Preview66.1
CodingMellum2-12B-A2.5B-ThinkingNot measuredMarginNo overlapZAYA1-74B-Preview53.2
MathMellum2-12B-A2.5B-ThinkingNot measuredMarginNo overlapZAYA1-74B-Preview76.4
Inst. FollowingMellum2-12B-A2.5B-Thinking76.5MarginNo overlapZAYA1-74B-PreviewNot measured

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Mellum2-12B-A2.5B-ThinkingB · ZAYA1-74B-Preview

  1. GPQA

    Knowledge
    Source ↗
    A 57.6%B 57.3%
    Winner: Mellum2-12B-A2.5B-ThinkingΔ 0.3
    GPQA: Mellum2-12B-A2.5B-Thinking scored 57.6%; ZAYA1-74B-Preview scored 57.3%. Mellum2-12B-A2.5B-Thinking wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewComparison
Input / output priceUSD per 1M tokensMellum2-12B-A2.5B-ThinkingNot availableZAYA1-74B-Preview$0 input / $0 outputA complete price comparison is not available.
Generation speedtokens per secondMellum2-12B-A2.5B-ThinkingNot availableZAYA1-74B-PreviewNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenMellum2-12B-A2.5B-ThinkingNot availableZAYA1-74B-PreviewNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensMellum2-12B-A2.5B-Thinking128KZAYA1-74B-Preview256KZAYA1-74B-Preview lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewResult
BFCL v4Source 45.6%—Not comparable
τ²-bench AirlineSource —56.1%Not comparable
Coding
BenchmarkMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewResult
LiveCodeBench v6Source —65.7%Not comparable
SWE-bench VerifiedSource —53.2%Not comparable
KnowledgeZAYA1-74B-Preview wins
BenchmarkMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewResult
MMLU-ReduxSource 86.2%—Not comparable
GPQASource 57.6%57.3%Mellum2-12B-A2.5B-Thinking leads
GPQA-DSource 57.6%57.3%Mellum2-12B-A2.5B-Thinking leads
MMLU-ProSource —68.1%Not comparable
Math
BenchmarkMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewResult
AIME26Source —76.4%Not comparable
Inst. Following
BenchmarkMellum2-12B-A2.5B-ThinkingZAYA1-74B-PreviewResult
IFEvalSource 76.5%—Not comparable
Frequently Asked Questions (2)

Which is better, Mellum2-12B-A2.5B-Thinking or ZAYA1-74B-Preview?

Mellum2-12B-A2.5B-Thinking and ZAYA1-74B-Preview 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, Mellum2-12B-A2.5B-Thinking or ZAYA1-74B-Preview?

ZAYA1-74B-Preview has the edge for knowledge tasks in this comparison, averaging 66.1 versus 57.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.

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