# Gemini 3.1 Pro Preview vs Phi 3 Mini 4k Instruct

> Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 27.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-pro-preview-vs-phi-3-mini-4k-instruct
- Last updated: 2026-10-11
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 8 categories and Phi 3 Mini 4k Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 14.1.
- The biggest single-benchmark swing is Chess Puzzles: 55% for Gemini 3.1 Pro Preview and 0% for Phi 3 Mini 4k Instruct.
- Phi 3 Mini 4k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| Provider | Google | Microsoft |
| Noometry Index | 56.7 | 27.9 |
| Rank | 23 | 328 |
| Context | 1.05M | — |
| Input $/M | $2 | — |
| Output $/M | $12 | — |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.1 Pro Preview: 42.5 (#99)
- Phi 3 Mini 4k Instruct: 26.6 (#323)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Coding | 1484 | 1093 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| LMArena WebDev | 1447 | — |
| SciCode | 58.9% | — |
| GSO | 22.6% | — |
| WeirdML | 72.1% | — |
| LiveBench Coding | — | 15.5% |
| MirrorCode | 8.9% | — |
| ALE-Bench | 1,161 | — |
| AlgoTune | 2.02 | — |
| HumanEval+ | — | 59.1% |
| MBPP+ | — | 54.2% |

## Agentic & Tool Use

- Gemini 3.1 Pro Preview: 37.7 (#34)
- Phi 3 Mini 4k Instruct: —

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| 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)
- Phi 3 Mini 4k Instruct: 14.1 (#328)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| Chess Puzzles | 55% | 0% |
| LMArena Hard Prompts | 1485 | 1072 |
| ARC-AGI-2 | 77.1% | — |
| SimpleBench | 79.6% | — |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98% | — |
| CritPt | 17.7% | — |
| EnigmaEval | 36.8% | — |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| LiveBench Reasoning | — | 26.8% |
| Mystery Game Puzzles | 34% | — |
| DTBench | 97.1% | — |
| LiveBench Data Analysis | — | 34.7% |
| LMCA | 53.8% | — |
| Adversarial NLI | — | 52.8% |
| BIG-Bench Hard | — | 71.7% |
| Epoch Capabilities Index | 154.77 | — |
| ForecastBench | 59 | — |
| HellaSwag | — | 76.7% |
| LiveBench | — | 22.4% |
| WinoGrande | — | 70.8% |

## Math

- Gemini 3.1 Pro Preview: 62.1 (#34)
- Phi 3 Mini 4k Instruct: 26.6 (#257)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Math | 1485 | 1111 |
| 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% | — |
| LiveBench Math | — | 15.7% |
| FrontierMath (Feb 2025 set) | 36.9% | — |
| FrontierMath Tier 4 (v1) | 16.7% | — |

## Knowledge

- Gemini 3.1 Pro Preview: 71.8 (#3)
- Phi 3 Mini 4k Instruct: 28.5 (#246)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Expert | 1485 | 1045 |
| GPQA Diamond | 94.4% | — |
| Humanity's Last Exam | 46.4% | — |
| SimpleQA Verified | 73.5% | — |
| Vectara Hallucination Rate | 10.4% | — |
| ARC (AI2) Challenge | — | 84.9% |
| MMLU | — | 68.8% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 64% |

## Multimodal

- Gemini 3.1 Pro Preview: 37.9 (#69)
- Phi 3 Mini 4k Instruct: —

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Vision | 1296 | — |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |

## Multilingual

- Gemini 3.1 Pro Preview: 57.0 (#12)
- Phi 3 Mini 4k Instruct: 26.3 (#280)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Non-English | 1477 | 1021 |
| LMArena Chinese | 1529 | 1021 |
| LMArena French | 1487 | 1076 |
| LMArena German | 1491 | 1044 |
| LMArena Japanese | 1493 | 935 |
| LMArena Korean | 1455 | 905 |
| LMArena Russian | 1498 | 1022 |
| LMArena Spanish | 1479 | 1085 |

## Instruction Following

- Gemini 3.1 Pro Preview: 77.0 (#32)
- Phi 3 Mini 4k Instruct: 47.7 (#303)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Instruction Following | 1466 | 1053 |
| LiveBench Instruction Following | — | 39.1% |

## Long Context

- Gemini 3.1 Pro Preview: 47.4 (#18)
- Phi 3 Mini 4k Instruct: 31.7 (#276)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Longer Query | 1483 | 1044 |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |

## Writing & Preference

- Gemini 3.1 Pro Preview: 66.1 (#37)
- Phi 3 Mini 4k Instruct: 27.6 (#300)

| Benchmark | Gemini 3.1 Pro Preview | Phi 3 Mini 4k Instruct |
|---|---|---|
| LMArena Text | 1481 | 1073 |
| LMArena Creative Writing | 1482 | 1037 |
| LMArena Multi-Turn | 1488 | 1018 |
| EQ-Bench Creative Writing | 1491 | — |
| EQ-Bench 4 | 1142 | — |
| LiveBench Language | — | 9.2% |

## FAQ

### Is Gemini 3.1 Pro Preview better than Phi 3 Mini 4k Instruct?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 27.9 on the Noometry Index.

### Is Gemini 3.1 Pro Preview or Phi 3 Mini 4k Instruct better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 26.6 in the Noometry coding category.

### How many benchmarks do Gemini 3.1 Pro Preview and Phi 3 Mini 4k Instruct share?

18 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Phi 3 Mini 4k Instruct has 35.