Model comparison
Gemma 4 12B vs GPT-5.4 mini
Head-to-head evidence from 15 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemma 4 12B #137 (Estimated); GPT-5.4 mini #75 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemma 4 12B and GPT-5.4 mini share 15 comparable benchmark results. 3 of 8 categories are comparable. 8 results are unique to Gemma 4 12B; 15 to GPT-5.4 mini.
Updated July 23, 2026- Shared results
- 15
- Gemma 4 12B only
- 8
- GPT-5.4 mini only
- 15
- Comparable categories
- 3 / 8
Pick GPT-5.4 mini if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if mathematics is the priority.
Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 6 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.4 mini is clearly ahead on the BenchAlign aggregate, 56.77 to 47.29. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 mini's sharpest advantage is in multimodal & grounded, where it averages 76.6 against 69.1. The single biggest benchmark swing on the page is GPQA, 78.8% to 88%. Gemma 4 12B does hit back in mathematics, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 mini gives you the larger context window at 400K, compared with 256K for Gemma 4 12B.
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 12B | Δ | GPT-5.4 mini |
|---|---|---|---|
| Math | Gemma 4 12B77.5 | Margin← 55.8 | GPT-5.4 mini21.7 |
| Knowledge | Gemma 4 12B77.5 | Margin← 29.7 | GPT-5.4 mini47.8 |
| Multimodal | Gemma 4 12B69.1 | Margin→ 7.5 | GPT-5.4 mini76.6 |
| Agentic | Gemma 4 12BNot measured | MarginNo overlap | GPT-5.4 mini65.7 |
| Reasoning | Gemma 4 12B43.4 | MarginNo overlap | GPT-5.4 miniNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 78.8%B 88%Winner: GPT-5.4 miniΔ 9.2GPQA: Gemma 4 12B scored 78.8%; GPT-5.4 mini scored 88%. GPT-5.4 mini wins this benchmark. - Source ↗
MMMU-Pro
MultimodalA 69.1%B 76.6%Winner: GPT-5.4 miniΔ 7.5MMMU-Pro: Gemma 4 12B scored 69.1%; GPT-5.4 mini scored 76.6%. GPT-5.4 mini wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemma 4 12B | GPT-5.4 mini | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemma 4 12BNot available | GPT-5.4 mini$0.75 input / $4.5 output | A complete price comparison is not available. |
| Generation speedtokens per second | Gemma 4 12BNot available | GPT-5.4 mini201 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemma 4 12BNot available | GPT-5.4 mini3.85 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemma 4 12B256K | GPT-5.4 mini400K | GPT-5.4 mini lists the larger context window. |
Benchmark Deep Dive
Agentic9 benchmarks
| Benchmark | Gemma 4 12B | GPT-5.4 mini | Result |
|---|---|---|---|
| τ²-bench resultsSource | 36.3% | 83.3% | GPT-5.4 mini leads |
| Terminal-Bench 2.0Source | — | 60% | Not comparable |
| OSWorld-VerifiedSource | — | 72.1% | Not comparable |
| MCP AtlasSource | — | 57.7% | Not comparable |
| ToolathlonSource | — | 42.9% | Not comparable |
| AA Agentic IndexSource | — | 30.2% | Not comparable |
| APEX-Agents-AASource | — | 28.2% | Not comparable |
| GDPval-AASource | — | 33.6% | Not comparable |
| GDPval-AASource | — | 1171 | Not comparable |
Coding4 benchmarks
Reasoning4 benchmarks
KnowledgeGemma 4 12B wins12 benchmarks
| Benchmark | Gemma 4 12B | GPT-5.4 mini | Result |
|---|---|---|---|
| GPQASource | 78.8% | 88% | GPT-5.4 mini leads |
| GPQA-DSource | 78.8% | — | Not comparable |
| MMLU-ProSource | 77.2% | — | Not comparable |
| HLE w/o toolsSource | 5.2% | 28.2% | GPT-5.4 mini leads |
| MMMLUSource | 83.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 22.0% | 40.0% | GPT-5.4 mini leads |
| AA-GPQA DiamondSource | 75.3% | 87.5% | GPT-5.4 mini leads |
| AA-HLESource | 14.8% | 26.6% | GPT-5.4 mini leads |
| AA-Omniscience IndexSource | -51.9% | -18.7% | GPT-5.4 mini leads |
| AA-Omniscience AccuracySource | 16.0% | 37.5% | GPT-5.4 mini leads |
| AA-Omniscience Hallucination RateSource | 80.8% | 89.8% | Gemma 4 12B leads |
| HLESource | — | 41.5% | Not comparable |
MathGemma 4 12B wins3 benchmarks
MultimodalGPT-5.4 mini wins5 benchmarks
Inst. Following1 benchmarks
| Benchmark | Gemma 4 12B | GPT-5.4 mini | Result |
|---|---|---|---|
| AA-IFBenchSource | 73.5% | 73.3% | Gemma 4 12B leads |
Frequently Asked Questions (4)
Which is better, Gemma 4 12B or GPT-5.4 mini?
GPT-5.4 mini is ahead on BenchLM's BenchAlign leaderboard, 56.77 to 47.29. The biggest single separator in this matchup is GPQA, where the scores are 78.8% and 88%.
Which is better for knowledge tasks, Gemma 4 12B or GPT-5.4 mini?
Gemma 4 12B has the edge for knowledge tasks in this comparison, averaging 77.5 versus 47.8. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.
Which is better for math, Gemma 4 12B or GPT-5.4 mini?
Gemma 4 12B has the edge for math in this comparison, averaging 77.5 versus 21.7. GPT-5.4 mini stays close enough that the answer can still flip depending on your workload.
Which is better for multimodal and grounded tasks, Gemma 4 12B or GPT-5.4 mini?
GPT-5.4 mini has the edge for multimodal and grounded tasks in this comparison, averaging 76.6 versus 69.1. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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