# Gemini 2.5 Pro vs Gemma 4 31B

> Side-by-side benchmark comparison for Gemini 2.5 Pro and Gemma 4 31B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-2-5-pro-vs-gemma-4-31b
- Last updated: October 17, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 2.5 Pro and Gemma 4 31B 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.
- Gemini 2.5 Pro has the larger published context window at 1M.

## Model Snapshot

| Property | Gemini 2.5 Pro | Gemma 4 31B |
|----------|----------|----------|
| Creator | Google | Google |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | 49.14 | 39.89 |
| Benchmarks Covered | 9 | 10 |
| Pricing (input/output) | $1.25 / $10.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 25.7 (Estimated · #102/128)
- Gemma 4 31B public-lane score: 19.7 (Estimated · #109/128)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 42.01% | 35.26% | Gemini 2.5 Pro |

### Coding

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 22.3 (Supported · #115/150)
- Gemma 4 31B public-lane score: 31.7 (Supported · #89/150)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 63.8% | Coming soon | Coming soon |
| Vibe Code Bench | 0.40% | Coming soon | Coming soon |
| SWE-bench (Vals) | 54.4% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 80.0% | Coming soon |
| SWE-Rebench | Coming soon | 41.6% | Coming soon |
| React Native Evals | Coming soon | 75.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 73.3 (Unranked · 2 rankable rows)
- Gemma 4 31B public-lane score: 66.6 (Unranked · 3 rankable rows)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | Coming soon | 66.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 74.8 (Unranked · 1 rankable row)
- Gemma 4 31B public-lane score: 74.3 (#26/54)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 76.9% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 45.6 (Supported · #96/184)
- Gemma 4 31B public-lane score: 40.9 (Supported · #114/184)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 83% | 84.3% | Gemma 4 31B |
| HLE | 18.8% | 26.5% | Gemma 4 31B |
| MMLU-Pro | Coming soon | 85.2% | Coming soon |
| HLE w/o tools | Coming soon | 19.5% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 57.8 (#83/148)
- Gemma 4 31B public-lane score: 92.9 (#15/148)

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 2.5 Pro public-lane score: 36.9 (Unranked · 3 rankable rows)
- Gemma 4 31B public-lane score: Coming soon

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2024 | 92% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 24.561% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 0.000% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 2.5 Pro and Gemma 4 31B?

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

- [Gemini 2.5 Pro vs Gemma 4 26B A4B](/compare/gemini-2-5-pro-vs-gemma-4-26b-a4b)
- [Gemma 4 31B vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gemma-4-31b)
- [Gemini 2.5 Pro vs Gemma 4 12B](/compare/gemini-2-5-pro-vs-gemma-4-12b)
- [Gemma 4 31B vs Gemma 4 12B](/compare/gemma-4-12b-vs-gemma-4-31b)

## Explore More

- [Gemini 2.5 Pro profile](/models/gemini-2-5-pro)
- [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)