# Gemini 3.1 Pro Preview vs Granite 4.2 3b

> Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 39.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-pro-preview-vs-granite-4-2-3b
- Last updated: 2026-10-12
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 7 categories and Granite 4.2 3b in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 26.0.
- Granite 4.2 3b has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| Provider | Google | IBM |
| Noometry Index | 56.7 | 39.4 |
| Rank | 23 | 169 |
| Context | 1.05M | — |
| Input $/M | $2 | — |
| Output $/M | $12 | — |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.1 Pro Preview: 42.5 (#99)
- Granite 4.2 3b: 40.0 (#151)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Coding | 1484 | 1361 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| LMArena WebDev | 1447 | — |
| SciCode | 58.9% | — |
| GSO | 22.6% | — |
| WeirdML | 72.1% | — |
| MirrorCode | 8.9% | — |
| ALE-Bench | 1,161 | — |
| AlgoTune | 2.02 | — |

## Agentic & Tool Use

- Gemini 3.1 Pro Preview: 37.7 (#34)
- Granite 4.2 3b: —

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 35.3% | — |
| τ²-bench Banking | 26% | — |
| DeepResearch Bench | 47.8% | — |
| PostTrainBench | 22% | — |
| BALROG | 57% | — |
| ExploitBench | 26.1% | — |
| GBAEval | 0.8% | — |
| GDP.pdf | 17% | — |
| LMArena Search | 1211 | — |
| METR Time Horizons | 77% | — |
| Vending-Bench 2 | 3,774 | — |

## Reasoning

- Gemini 3.1 Pro Preview: 71.7 (#12)
- Granite 4.2 3b: 26.0 (#138)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Hard Prompts | 1485 | 1306 |
| ARC-AGI-2 | 77.1% | — |
| SimpleBench | 79.6% | — |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98% | — |
| CritPt | 17.7% | — |
| Chess Puzzles | 55% | — |
| EnigmaEval | 36.8% | — |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 34% | — |
| DTBench | 97.1% | — |
| LMCA | 53.8% | — |
| Epoch Capabilities Index | 154.77 | — |
| ForecastBench | 59 | — |

## Math

- Gemini 3.1 Pro Preview: 62.1 (#34)
- Granite 4.2 3b: —

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 86.5% | — |
| OTIS Mock AIME 2024-2025 | 95.6% | — |
| ProofBench | 26% | — |
| LMArena Math | 1485 | — |
| FrontierMath (Feb 2025 set) | 36.9% | — |
| FrontierMath Tier 4 (v1) | 16.7% | — |

## Knowledge

- Gemini 3.1 Pro Preview: 71.8 (#3)
- Granite 4.2 3b: 36.3 (#171)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Expert | 1485 | 1315 |
| GPQA Diamond | 94.4% | — |
| Humanity's Last Exam | 46.4% | — |
| SimpleQA Verified | 73.5% | — |
| Vectara Hallucination Rate | 10.4% | — |

## Multimodal

- Gemini 3.1 Pro Preview: 37.9 (#69)
- Granite 4.2 3b: —

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Vision | 1296 | — |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |

## Multilingual

- Gemini 3.1 Pro Preview: 57.0 (#12)
- Granite 4.2 3b: 42.1 (#198)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Non-English | 1477 | 1268 |
| LMArena Chinese | 1529 | 1269 |
| LMArena Russian | 1498 | 1249 |
| LMArena French | 1487 | — |
| LMArena German | 1491 | — |
| LMArena Japanese | 1493 | — |
| LMArena Korean | 1455 | — |
| LMArena Spanish | 1479 | — |

## Instruction Following

- Gemini 3.1 Pro Preview: 77.0 (#32)
- Granite 4.2 3b: 67.1 (#200)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Instruction Following | 1466 | 1273 |

## Long Context

- Gemini 3.1 Pro Preview: 47.4 (#18)
- Granite 4.2 3b: 39.2 (#185)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Longer Query | 1483 | 1291 |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |

## Writing & Preference

- Gemini 3.1 Pro Preview: 66.1 (#37)
- Granite 4.2 3b: 47.2 (#212)

| Benchmark | Gemini 3.1 Pro Preview | Granite 4.2 3b |
|---|---|---|
| LMArena Text | 1481 | 1293 |
| LMArena Creative Writing | 1482 | 1205 |
| LMArena Multi-Turn | 1488 | 1290 |
| EQ-Bench Creative Writing | 1491 | — |
| EQ-Bench 4 | 1142 | — |

## FAQ

### Is Gemini 3.1 Pro Preview better than Granite 4.2 3b?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 39.4 on the Noometry Index.

### Is Gemini 3.1 Pro Preview or Granite 4.2 3b better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 40.0 in the Noometry coding category.

### How many benchmarks do Gemini 3.1 Pro Preview and Granite 4.2 3b share?

11 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Granite 4.2 3b has 11.