# Gemma 4 12B vs Gemma 4 31B

> Side-by-side benchmark comparison for Gemma 4 12B and Gemma 4 31B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemma-4-12b-vs-gemma-4-31b
- Last updated: September 4, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Gemma 4 31B if you want the stronger benchmark profile. Gemma 4 12B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemma 4 31B leads overall 58.69 to 46.64.
- The clearest category separation is in reasoning, where the averages are 34 for Gemma 4 12B and 70.1 for Gemma 4 31B.
- The biggest single benchmark swing is HLE w/o tools in Knowledge, with scores of 5.2% and 19.5%.

## Model Snapshot

| Property | Gemma 4 12B | Gemma 4 31B |
|----------|----------|----------|
| Creator | Google | Google |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 256K |
| Overall Score | 46.64 | 58.69 |
| Benchmarks Covered | 12 | 8 |
| Pricing (input/output) | N/A | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemma 4 12B public-lane score: 47.9 (Estimated · #81/151)
- Gemma 4 31B public-lane score: 27.6 (Supported · #140/151)

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | Coming soon | 35.26% | Coming soon |

### Coding

- Winner: Coming soon
- Gemma 4 12B public-lane score: 46.6 (Estimated · #97/183)
- Gemma 4 31B public-lane score: 43.5 (Supported · #123/183)

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 72.0% | Coming soon | Coming soon |
| SWE-Rebench | Coming soon | 41.6% | Coming soon |
| React Native Evals | Coming soon | 75.2% | Coming soon |

### Multimodal & Grounded

- Winner: Gemma 4 31B
- Gemma 4 12B public-lane score: 26.1 (#44/48)
- Gemma 4 31B public-lane score: 58.4 (#30/48)

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 69.1% | 76.9% | Gemma 4 31B |
| MathVision | 79.7% | Coming soon | Coming soon |
| MedXpertQA (MM) | 48.7% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- Gemma 4 12B public-lane score: 34 (Unranked · 4 rankable rows)
- Gemma 4 31B public-lane score: 70.1 (Unranked · 2 rankable rows)

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| BBH | 53% | Coming soon | Coming soon |
| MRCRv2 | 43.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Gemma 4 31B
- Gemma 4 12B public-lane score: 40.4 (Supported · #138/181)
- Gemma 4 31B public-lane score: 47.9 (Supported · #104/181)

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 78.8% | 84.3% | Gemma 4 31B |
| GPQA-D | 78.8% | Coming soon | Coming soon |
| MMLU-Pro | 77.2% | 85.2% | Gemma 4 31B |
| HLE w/o tools | 5.2% | 19.5% | Gemma 4 31B |
| MMMLU | 83.4% | Coming soon | Coming soon |
| HLE | Coming soon | 26.5% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Gemma 4 12B public-lane score: 89.8 (#21/120)
- Gemma 4 31B public-lane score: 92.6 (#12/120)

### Mathematics

- Winner: Coming soon
- Gemma 4 12B public-lane score: 57.6 (Unranked · 1 rankable row)
- Gemma 4 31B public-lane score: Coming soon

| Benchmark | Gemma 4 12B | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 77.5% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Gemma 4 12B or Gemma 4 31B?

Gemma 4 31B is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemma 4 12B and Gemma 4 31B?

The widest category gap is in reasoning, where the averages are 34 for Gemma 4 12B and 70.1 for Gemma 4 31B.

### How many benchmarks does Gemma 4 12B cover on BenchLM?

Gemma 4 12B currently has 12 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemma 4 31B cover on BenchLM?

Gemma 4 31B currently has 8 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemma 4 12B vs Gemma 4 26B A4B](/compare/gemma-4-12b-vs-gemma-4-26b-a4b)
- [Gemma 4 31B vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gemma-4-31b)
- [Gemma 4 12B vs Gemma 4 E4B](/compare/gemma-4-12b-vs-gemma-4-e4b)
- [Gemma 4 31B vs Gemma 4 E4B](/compare/gemma-4-31b-vs-gemma-4-e4b)

## Explore More

- [Gemma 4 12B profile](/models/gemma-4-12b)
- [Gemma 4 31B profile](/models/gemma-4-31b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)