# Gemini 2.5 Pro vs Gemma 4 31B IT

> Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.2 on the Noometry Index. Gemma 4 31B IT costs 23× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-2-5-pro-vs-gemma-4-31b-it
- Last updated: 2026-10-10
- Shared benchmarks: 30

## Summary

- They share 30 benchmarks with published results for both. Gemini 2.5 Pro scores higher in 7 categories and Gemma 4 31B IT in 2 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 2.5 Pro leads 55.8 to 37.9.
- The biggest single-benchmark swing is Chess Puzzles: 20% for Gemini 2.5 Pro and 5% for Gemma 4 31B IT.
- Gemma 4 31B IT is cheaper at $0.09 / $0.34 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.
- Gemini 2.5 Pro accepts more context: 1.05M tokens versus 262K.
- Gemma 4 31B IT has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 44.9 | 43.2 |
| Rank | 67 | 85 |
| Context | 1.05M | 262K |
| Input $/M | $1.25 | $0.09 |
| Output $/M | $10 | $0.34 |
| Weights | Proprietary | Open |

## Coding

- Gemini 2.5 Pro: 42.8 (#86)
- Gemma 4 31B IT: 41.9 (#98)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena WebDev | 1227 | 1364 |
| SciCode | 42.8% | 43.4% |
| WeirdML | 54% | 52.3% |
| LMArena Coding | 1452 | 1459 |
| ALE-Bench | 785.52 | 925.5 |
| SWE-bench Verified | 57.6% | — |
| SWE-bench Verified (bash only) | 53.6% | — |
| Aider Polyglot | 83.1% | — |
| GSO | 3.9% | — |
| LiveBench Coding | 85.9% | — |
| CadEval | 64% | — |
| AlgoTune | 1.51 | — |

## Agentic & Tool Use

- Gemini 2.5 Pro: 29.1 (#81)
- Gemma 4 31B IT: —

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| Terminal-Bench | 32.6% | — |
| GDPval | 23.3% | — |
| Remote Labor Index | 0.8% | — |
| TheAgentCompany | 30.3% | — |
| τ²-bench Banking | 13.7% | — |
| DeepResearch Bench | 42.8% | — |
| BALROG | 43.3% | — |
| LMArena Search | 1142 | — |
| METR Time Horizons | 55.4% | — |
| Vending-Bench 2 | 573.64 | — |

## Reasoning

- Gemini 2.5 Pro: 28.8 (#85)
- Gemma 4 31B IT: 26.4 (#119)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | 63.5% |
| CritPt | 2% | 1.4% |
| Chess Puzzles | 20% | 5% |
| LMArena Hard Prompts | 1455 | 1448 |
| DTBench | 82.4% | 82.7% |
| LMCA | 34.8% | 39.3% |
| Epoch Capabilities Index | 145.32 | 142.74 |
| ARC-AGI-2 | 4.9% | — |
| SimpleBench | 62.4% | — |
| NYT Connections (extended) | — | 70.6% |
| ARC-AGI-1 | 41% | — |
| EnigmaEval | 5.6% | — |
| Thematic Generalization | — | 53% |
| LiveBench Reasoning | 89.8% | — |
| LiveBench Data Analysis | 79.9% | — |
| Surface Evolver Bench | — | 30.6% |
| ForecastBench | 61.3 | — |
| LiveBench | 82.3% | — |

## Math

- Gemini 2.5 Pro: 31.9 (#191)
- Gemma 4 31B IT: 41.3 (#72)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 84.7% | 73.3% |
| LMArena Math | 1450 | 1464 |
| FrontierMath (Tiers 1-3) | 24.6% | — |
| FrontierMath Tier 4 | 0% | — |
| Omni-MATH | 41.6% | — |
| LiveBench Math | 90.2% | — |
| MATH Level 5 | 95.9% | — |
| FrontierMath (Feb 2025 set) | 14.1% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 2.5 Pro: 55.8 (#41)
- Gemma 4 31B IT: 37.9 (#141)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| GPQA Diamond | 85.3% | 75.8% |
| Vectara Hallucination Rate | 7% | 7.4% |
| LMArena Expert | 1452 | 1465 |
| Humanity's Last Exam | 21.6% | — |
| SimpleQA Verified | — | 10.4% |
| MMLU-Pro | 86.3% | — |
| Confabulations | 10.6% | — |
| GPQA (HELM) | 74.9% | — |

## Multimodal

- Gemini 2.5 Pro: 44.5 (#16)
- Gemma 4 31B IT: 41.0 (#32)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena Vision | 1263 | 1278 |
| LMArena Document | 1421 | 1425 |
| GeoBench | 86% | — |
| VPCT | 48% | — |
| SpatialViz-Bench | 44.7% | — |

## Multilingual

- Gemini 2.5 Pro: 55.5 (#30)
- Gemma 4 31B IT: 54.0 (#52)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena Non-English | 1452 | 1431 |
| LMArena Chinese | 1507 | 1478 |
| LMArena French | 1473 | 1436 |
| LMArena Russian | 1460 | 1462 |
| LMArena Spanish | 1473 | 1443 |
| LMArena German | 1487 | — |
| LMArena Japanese | 1462 | — |
| LMArena Korean | 1435 | — |

## Instruction Following

- Gemini 2.5 Pro: 75.2 (#71)
- Gemma 4 31B IT: 75.6 (#58)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena Instruction Following | 1436 | 1433 |
| LiveBench Instruction Following | 80.6% | — |
| IFEval | 84% | — |

## Long Context

- Gemini 2.5 Pro: 59.7 (#5)
- Gemma 4 31B IT: 44.2 (#67)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena Longer Query | 1449 | 1446 |
| Fiction.LiveBench | 91.7% | — |

## Writing & Preference

- Gemini 2.5 Pro: 63.9 (#60)
- Gemma 4 31B IT: 60.7 (#92)

| Benchmark | Gemini 2.5 Pro | Gemma 4 31B IT |
|---|---|---|
| LMArena Text | 1458 | 1443 |
| LMArena Creative Writing | 1453 | 1416 |
| EQ-Bench Creative Writing | 1421 | 1368 |
| LMArena Multi-Turn | 1453 | 1452 |
| Short-Story Creative Writing | 83.8% | — |
| WildBench | 85.7% | — |
| EQ-Bench 4 | — | 1120 |
| LiveBench Language | 67.8% | — |

## FAQ

### Is Gemini 2.5 Pro better than Gemma 4 31B IT?

Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.2 on the Noometry Index. Gemma 4 31B IT costs 23× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

### Which is cheaper, Gemini 2.5 Pro or Gemma 4 31B IT?

Gemma 4 31B IT is cheaper. It lists at $0.09 per million input tokens and $0.34 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.

### Is Gemini 2.5 Pro or Gemma 4 31B IT better for coding?

They score almost the same on coding (42.8 vs 41.9); test both on your own repository before choosing.

### Which has the bigger context window?

Gemini 2.5 Pro does, with 1.05M tokens against 262K.

### How many benchmarks do Gemini 2.5 Pro and Gemma 4 31B IT share?

30 benchmarks have published results for both models. Gemini 2.5 Pro has 78 scored results on Noometry and Gemma 4 31B IT has 35.