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Model comparison

GPT-5 mini 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.
43.93/100
No comparison
N/A
0 category wins0 category wins

Public leaderboard positions: GPT-5 mini #153 (Supported); Mellum2-12B-A2.5B-Instruct unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

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

Updated July 23, 2026
Shared results
0
GPT-5 mini only
1
Mellum2-12B-A2.5B-Instruct only
5
Comparable categories
0 / 8

Benchmark data for GPT-5 mini and Mellum2-12B-A2.5B-Instruct is coming soon on BenchLM.

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

Why this result

BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.

Operational comparison

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

MetricGPT-5 miniMellum2-12B-A2.5B-InstructComparison
Input / output priceUSD per 1M tokensGPT-5 mini$0.25 input / $2 outputMellum2-12B-A2.5B-InstructNot availableA complete price comparison is not available.
Generation speedtokens per secondGPT-5 mini86 tok/sMellum2-12B-A2.5B-InstructNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGPT-5 mini65.32 sMellum2-12B-A2.5B-InstructNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensGPT-5 mini128KMellum2-12B-A2.5B-Instruct128KListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkGPT-5 miniMellum2-12B-A2.5B-InstructResult
BFCL v4Source —44.2%Not comparable
Coding
BenchmarkGPT-5 miniMellum2-12B-A2.5B-InstructResult
Vibe Code BenchSource 14.17%—Not comparable
Knowledge
BenchmarkGPT-5 miniMellum2-12B-A2.5B-InstructResult
MMLU-ReduxSource —78.1%Not comparable
GPQASource —40.9%Not comparable
GPQA-DSource —40.9%Not comparable
Inst. Following
BenchmarkGPT-5 miniMellum2-12B-A2.5B-InstructResult
IFEvalSource —75.8%Not comparable
Frequently Asked Questions (3)

Can I compare GPT-5 mini and Mellum2-12B-A2.5B-Instruct on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for GPT-5 mini and Mellum2-12B-A2.5B-Instruct today?

GPT-5 mini: $0.25 input / $2.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

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