# Gemini 1.5 Flash 8B vs Phi-4

> Phi-4 is the stronger model overall, scoring 31.2 to 29.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-flash-8b-vs-phi-4
- Last updated: 2026-10-12
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Gemini 1.5 Flash 8B scores higher in 6 categories and Phi-4 in 2 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Phi-4 leads 32.6 to 16.0.
- The biggest single-benchmark swing is GPQA Diamond: 33% for Gemini 1.5 Flash 8B and 56.1% for Phi-4.
- Phi-4 has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| Provider | Google | Microsoft |
| Noometry Index | 29.9 | 31.2 |
| Rank | 301 | 279 |
| Context | — | 128K |
| Input $/M | — | $0.07 |
| Output $/M | — | $0.14 |
| Weights | Proprietary | Open |

## Coding

- Gemini 1.5 Flash 8B: 35.5 (#225)
- Phi-4: 34.4 (#239)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Coding | 1218 | 1231 |
| BigCodeBench Instruct | — | 45.5% |
| LiveBench Coding | — | 30.7% |
| BigCodeBench Complete | — | 55.4% |

## Agentic & Tool Use

- Gemini 1.5 Flash 8B: —
- Phi-4: 22.8 (#128)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 28.8% |
| BALROG | — | 11.6% |

## Reasoning

- Gemini 1.5 Flash 8B: 20.0 (#244)
- Phi-4: 17.7 (#291)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Hard Prompts | 1209 | 1220 |
| Chess Puzzles | — | 1% |
| LiveBench Reasoning | — | 47.8% |
| DTBench | 50% | — |
| LiveBench Data Analysis | — | 45.2% |
| Epoch Capabilities Index | — | 130.42 |
| LiveBench | — | 41.6% |

## Math

- Gemini 1.5 Flash 8B: 14.2 (#302)
- Phi-4: 20.8 (#285)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.6% | 13.8% |
| LMArena Math | 1207 | 1246 |
| LiveBench Math | — | 42% |
| MATH Level 5 | — | 64.9% |

## Knowledge

- Gemini 1.5 Flash 8B: 16.0 (#289)
- Phi-4: 32.6 (#209)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| GPQA Diamond | 33% | 56.1% |
| LMArena Expert | 1185 | 1203 |
| Confabulations | — | 29.4% |
| Vectara Hallucination Rate | — | 3.7% |
| MMLU | — | 84.8% |

## Multimodal

- Gemini 1.5 Flash 8B: 28.2 (#115)
- Phi-4: —

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Vision | 1044 | — |

## Multilingual

- Gemini 1.5 Flash 8B: 38.5 (#229)
- Phi-4: 37.2 (#237)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Non-English | 1215 | 1197 |
| LMArena Chinese | 1231 | 1212 |
| LMArena French | 1234 | 1224 |
| LMArena German | 1206 | 1222 |
| LMArena Japanese | 1150 | 1158 |
| LMArena Korean | 1140 | 1151 |
| LMArena Russian | 1236 | 1209 |
| LMArena Spanish | 1212 | 1234 |

## Instruction Following

- Gemini 1.5 Flash 8B: 62.8 (#236)
- Phi-4: 60.4 (#251)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Instruction Following | 1199 | 1201 |
| LiveBench Instruction Following | — | 58.4% |

## Long Context

- Gemini 1.5 Flash 8B: 37.0 (#225)
- Phi-4: 36.9 (#226)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Longer Query | 1219 | 1217 |

## Writing & Preference

- Gemini 1.5 Flash 8B: 42.8 (#232)
- Phi-4: 40.5 (#244)

| Benchmark | Gemini 1.5 Flash 8B | Phi-4 |
|---|---|---|
| LMArena Text | 1226 | 1217 |
| LMArena Creative Writing | 1218 | 1182 |
| LMArena Multi-Turn | 1185 | 1206 |
| Short-Story Creative Writing | — | 62.6% |
| LiveBench Language | — | 25.6% |

## FAQ

### Is Gemini 1.5 Flash 8B better than Phi-4?

Phi-4 is the stronger model overall, scoring 31.2 to 29.9 on the Noometry Index.

### Is Gemini 1.5 Flash 8B or Phi-4 better for coding?

Gemini 1.5 Flash 8B scores higher on coding benchmarks: 35.5 versus 34.4 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Flash 8B and Phi-4 share?

19 benchmarks have published results for both models. Gemini 1.5 Flash 8B has 21 scored results on Noometry and Phi-4 has 37.