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Model comparison

Celeris-1 vs Mellum2-12B-A2.5B-Instruct

Data verified

Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

No sourced benchmark result is currently shared by both models. This page therefore compares only the available metadata, pricing, and runtime rows; it does not name a quality winner.
Celeris-1
Celeris
N/A
No comparison
N/A
1 category wins0 category wins

Evidence parity. Celeris-1 and Mellum2-12B-A2.5B-Instruct share 0 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Celeris-1; 5 to Mellum2-12B-A2.5B-Instruct.

Updated July 24, 2026
Shared results
0
Celeris-1 only
1
Mellum2-12B-A2.5B-Instruct only
5
Comparable categories
1 / 8

Treat this as a split decision. Celeris-1 makes more sense if knowledge is the priority; Mellum2-12B-A2.5B-Instruct is the better fit if you need the larger 128K context window.

Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Celeris-1 and Mellum2-12B-A2.5B-Instruct 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.

Mellum2-12B-A2.5B-Instruct gives you the larger context window at 128K, compared with 8K for Celeris-1.

Operational comparison

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

MetricCeleris-1Mellum2-12B-A2.5B-InstructComparison
Input / output priceUSD per 1M tokensCeleris-1$2 input / $6 outputMellum2-12B-A2.5B-InstructNot availableA complete price comparison is not available.
Generation speedtokens per secondCeleris-1Not availableMellum2-12B-A2.5B-InstructNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenCeleris-1Not availableMellum2-12B-A2.5B-InstructNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensCeleris-18KMellum2-12B-A2.5B-Instruct128KMellum2-12B-A2.5B-Instruct lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkCeleris-1Mellum2-12B-A2.5B-InstructResult
BFCL v4Source —44.2%Not comparable
KnowledgeCeleris-1 wins
BenchmarkCeleris-1Mellum2-12B-A2.5B-InstructResult
MMLU-ProSource 75.9%—Not comparable
MMLU-ReduxSource —78.1%Not comparable
GPQASource —40.9%Not comparable
GPQA-DSource —40.9%Not comparable
Inst. Following
BenchmarkCeleris-1Mellum2-12B-A2.5B-InstructResult
IFEvalSource —75.8%Not comparable
Frequently Asked Questions (2)

Which is better, Celeris-1 or Mellum2-12B-A2.5B-Instruct?

Celeris-1 and Mellum2-12B-A2.5B-Instruct 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, Celeris-1 or Mellum2-12B-A2.5B-Instruct?

Celeris-1 has the edge for knowledge tasks in this comparison, averaging 75.9 versus 40.9. Mellum2-12B-A2.5B-Instruct stays close enough that the answer can still flip depending on your workload.

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Last updated: July 24, 2026

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