Model comparison
Gemma 4 E4B vs Mellum2-12B-A2.5B-Thinking
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemma 4 E4B #155 (Estimated); Mellum2-12B-A2.5B-Thinking unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemma 4 E4B and Mellum2-12B-A2.5B-Thinking share 1 comparable benchmark result. 1 of 8 categories are comparable. 13 results are unique to Gemma 4 E4B; 4 to Mellum2-12B-A2.5B-Thinking.
Updated July 23, 2026- Shared results
- 1
- Gemma 4 E4B only
- 13
- Mellum2-12B-A2.5B-Thinking only
- 4
- Comparable categories
- 1 / 8
Treat this as a split decision. Gemma 4 E4B makes more sense if knowledge is the priority; Mellum2-12B-A2.5B-Thinking is the better fit if its strengths line up with your actual workload.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result 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
Gemma 4 E4B and Mellum2-12B-A2.5B-Thinking 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.
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 | Gemma 4 E4B | Δ | Mellum2-12B-A2.5B-Thinking |
|---|---|---|---|
| Knowledge | Gemma 4 E4B67.4 | Margin← 9.8 | Mellum2-12B-A2.5B-Thinking57.6 |
| Inst. Following | Gemma 4 E4BNot measured | MarginNo overlap | Mellum2-12B-A2.5B-Thinking76.5 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 58.6%B 57.6%Winner: Gemma 4 E4BΔ 1GPQA: Gemma 4 E4B scored 58.6%; Mellum2-12B-A2.5B-Thinking scored 57.6%. Gemma 4 E4B wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemma 4 E4B | Mellum2-12B-A2.5B-Thinking | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemma 4 E4B$0 input / $0 output | Mellum2-12B-A2.5B-ThinkingNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Gemma 4 E4BNot available | Mellum2-12B-A2.5B-ThinkingNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemma 4 E4BNot available | Mellum2-12B-A2.5B-ThinkingNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemma 4 E4B128K | Mellum2-12B-A2.5B-Thinking128K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic2 benchmarks
Coding1 benchmarks
| Benchmark | Gemma 4 E4B | Mellum2-12B-A2.5B-Thinking | Result |
|---|---|---|---|
| AA-SciCodeSource | 24.4% | — | Not comparable |
Reasoning2 benchmarks
KnowledgeGemma 4 E4B wins10 benchmarks
| Benchmark | Gemma 4 E4B | Mellum2-12B-A2.5B-Thinking | Result |
|---|---|---|---|
| GPQASource | 58.6% | 57.6% | Gemma 4 E4B leads |
| MMLU-ProSource | 69.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 12.5% | — | Not comparable |
| AA-GPQA DiamondSource | 57.6% | — | Not comparable |
| AA-HLESource | 3.7% | — | Not comparable |
| AA-Omniscience IndexSource | -20.0% | — | Not comparable |
| AA-Omniscience AccuracySource | 8.6% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 31.3% | — | Not comparable |
| MMLU-ReduxSource | — | 86.2% | Not comparable |
| GPQA-DSource | — | 57.6% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Gemma 4 E4B | Mellum2-12B-A2.5B-Thinking | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 51.4% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Gemma 4 E4B or Mellum2-12B-A2.5B-Thinking?
Gemma 4 E4B and Mellum2-12B-A2.5B-Thinking 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, Gemma 4 E4B or Mellum2-12B-A2.5B-Thinking?
Gemma 4 E4B has the edge for knowledge tasks in this comparison, averaging 67.4 versus 57.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.
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