# Gemini 3.8 Flash vs Phi 3 Small 8k Instruct

> Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 29.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-8-flash-vs-phi-3-small-8k-instruct
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 8 categories and Phi 3 Small 8k Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 14.8.
- Phi 3 Small 8k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| Provider | Google | Microsoft |
| Noometry Index | 61.8 | 29.3 |
| Rank | 11 | 314 |
| Context | 1.05M | — |
| Input $/M | $0.75 | — |
| Output $/M | $3.75 | — |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.8 Flash: 59.2 (#15)
- Phi 3 Small 8k Instruct: 27.9 (#318)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Coding | 1510 | 1101 |
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| CursorBench | 39.6% | — |
| LMArena WebDev | 1584 | — |
| FrontierSWE | 19.6% | — |
| SciCode | 56.6% | — |
| WeirdML | 84.8% | — |
| LiveBench Coding | — | 20.3% |
| ALE-Bench | 1,270 | — |

## Agentic & Tool Use

- Gemini 3.8 Flash: 41.8 (#21)
- Phi 3 Small 8k Instruct: —

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| APEX-Agents | 64.3% | — |
| Remote Labor Index | 5.8% | — |
| GDP.pdf | 23.4% | — |
| Vending-Bench 2 | 5,094 | — |

## Reasoning

- Gemini 3.8 Flash: 76.9 (#5)
- Phi 3 Small 8k Instruct: 14.8 (#323)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1508 | 1100 |
| ARC-AGI-2 | 89.2% | — |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 18.3% | — |
| Chess Puzzles | 61% | — |
| LiveBench Reasoning | — | 15.9% |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LiveBench Data Analysis | — | 30.3% |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
| Adversarial NLI | — | 58.1% |
| BIG-Bench Hard | — | 79.1% |
| Epoch Capabilities Index | 156.71 | — |
| HellaSwag | — | 77% |
| LiveBench | — | 24% |
| WinoGrande | — | 81.5% |

## Math

- Gemini 3.8 Flash: 65.3 (#28)
- Phi 3 Small 8k Instruct: 27.6 (#248)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Math | 1528 | 1151 |
| FrontierMath (Tiers 1-3) | 68.4% | — |
| FrontierMath Tier 4 | 22% | — |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| ProofBench | 48% | — |
| LiveBench Math | — | 17.6% |

## Knowledge

- Gemini 3.8 Flash: 74.8 (#2)
- Phi 3 Small 8k Instruct: 29.1 (#240)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Expert | 1524 | 1067 |
| GPQA Diamond | 95.4% | — |
| Humanity's Last Exam | 44.5% | — |
| SimpleQA Verified | 69.7% | — |
| ARC (AI2) Challenge | — | 90.7% |
| MMLU | — | 75.7% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 58.1% |

## Multimodal

- Gemini 3.8 Flash: 40.7 (#45)
- Phi 3 Small 8k Instruct: —

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Vision | 1314 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |

## Multilingual

- Gemini 3.8 Flash: 58.0 (#5)
- Phi 3 Small 8k Instruct: 28.5 (#272)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Non-English | 1491 | 1058 |
| LMArena Chinese | 1554 | 1061 |
| LMArena French | 1498 | 1135 |
| LMArena German | 1493 | 1080 |
| LMArena Japanese | 1502 | 966 |
| LMArena Korean | 1459 | 894 |
| LMArena Russian | 1515 | 1111 |
| LMArena Spanish | 1485 | 1111 |

## Instruction Following

- Gemini 3.8 Flash: 78.0 (#13)
- Phi 3 Small 8k Instruct: 51.9 (#292)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Instruction Following | 1490 | 1087 |
| LiveBench Instruction Following | — | 47.2% |

## Long Context

- Gemini 3.8 Flash: 46.3 (#24)
- Phi 3 Small 8k Instruct: 33.0 (#267)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Longer Query | 1508 | 1088 |

## Writing & Preference

- Gemini 3.8 Flash: 72.2 (#15)
- Phi 3 Small 8k Instruct: 31.1 (#284)

| Benchmark | Gemini 3.8 Flash | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Text | 1499 | 1110 |
| LMArena Creative Writing | 1492 | 1083 |
| LMArena Multi-Turn | 1501 | 1068 |
| EQ-Bench Creative Writing | 1748 | — |
| LiveBench Language | — | 12.9% |

## FAQ

### Is Gemini 3.8 Flash better than Phi 3 Small 8k Instruct?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 29.3 on the Noometry Index.

### Is Gemini 3.8 Flash or Phi 3 Small 8k Instruct better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 27.9 in the Noometry coding category.

### How many benchmarks do Gemini 3.8 Flash and Phi 3 Small 8k Instruct share?

17 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Phi 3 Small 8k Instruct has 32.