# Gemma 4 31B vs GPT-5.2

> Side-by-side benchmark comparison for Gemma 4 31B and GPT-5.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemma-4-31b-vs-gpt-5-2
- Last updated: September 18, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemma 4 31B and GPT-5.2 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemma 4 31B has the lower published output-token price.
- GPT-5.2 has the larger published context window at 400K.

## Model Snapshot

| Property | Gemma 4 31B | GPT-5.2 |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 400K |
| Independent public score (not head-to-head) | 52.4 | 64.86 |
| Benchmarks Covered | 8 | 15 |
| Pricing (input/output) | $0.00 / $0.00 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 45.4 (Estimated · #86/154)
- GPT-5.2 public-lane score: 42.7 (Supported · #107/154)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 35.26% | 46.54% | GPT-5.2 |
| BrowseComp | Coming soon | 65.8% | Coming soon |
| OSWorld-Verified | Coming soon | 47.3% | Coming soon |
| JobBench | Coming soon | 34.3% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 42.3 (Supported · #108/154)
- GPT-5.2 public-lane score: 46.3 (Supported · #87/154)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-Rebench | 41.6% | Coming soon | Coming soon |
| React Native Evals | 75.2% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 80% | Coming soon |
| SWE-bench Pro | Coming soon | 55.6% | Coming soon |
| Vibe Code Bench | Coming soon | 53.50% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 58.5 (#30/48)
- GPT-5.2 public-lane score: 66.3 (#22/48)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.9% | 79.5% | GPT-5.2 |
| MathVision | Coming soon | 83.0% | Coming soon |
| CharXiv | Coming soon | 82.1% | Coming soon |
| V* | Coming soon | 75.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 68.9 (Unranked · 2 rankable rows)
- GPT-5.2 public-lane score: 53.7 (Unranked · 3 rankable rows)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 52.9% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 45.7 (Supported · #108/184)
- GPT-5.2 public-lane score: 61.6 (Supported · #29/184)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 84.3% | 92.4% | GPT-5.2 |
| MMLU-Pro | 85.2% | Coming soon | Coming soon |
| HLE | 26.5% | Coming soon | Coming soon |
| HLE w/o tools | 19.5% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: 91.5 (#12/124)
- GPT-5.2 public-lane score: 91.2 (#14/124)

### Mathematics

- Winner: Insufficient shared evidence
- Gemma 4 31B public-lane score: Coming soon
- GPT-5.2 public-lane score: 57.4 (Unranked · 2 rankable rows)

| Benchmark | Gemma 4 31B | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 40.700% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 18.800% | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemma 4 31B and GPT-5.2?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Gemma 4 31B vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gemma-4-31b)
- [GPT-5.2 vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gpt-5-2)
- [Gemma 4 31B vs Gemma 4 12B](/compare/gemma-4-12b-vs-gemma-4-31b)
- [GPT-5.2 vs Gemma 4 12B](/compare/gemma-4-12b-vs-gpt-5-2)

## Explore More

- [Gemma 4 31B profile](/models/gemma-4-31b)
- [GPT-5.2 profile](/models/gpt-5-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)