# Gemini 2.5 Flash vs Phi 3 Mini 128k Instruct

> Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-vs-phi-3-mini-128k-instruct
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 7 categories and Phi 3 Mini 128k Instruct in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where Gemini 2.5 Flash leads 52.3 to 25.2.
- Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| Provider | Google | Microsoft |
| Noometry Index | 39.3 | 29.7 |
| Rank | 170 | 305 |
| Context | 1.05M | — |
| Input $/M | $0.30 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Gemini 2.5 Flash: 35.8 (#220)
- Phi 3 Mini 128k Instruct: 28.8 (#312)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Coding | 1424 | 1039 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| WeirdML | 41.9% | — |
| BigCodeBench Instruct | — | 29.6% |
| BigCodeBench Complete | — | 40.6% |
| ALE-Bench | 661.88 | — |

## Agentic & Tool Use

- Gemini 2.5 Flash: 30.8 (#74)
- Phi 3 Mini 128k Instruct: —

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| BALROG | 33.5% | — |
| Vending-Bench 2 | 548.84 | — |

## Reasoning

- Gemini 2.5 Flash: 18.1 (#286)
- Phi 3 Mini 128k Instruct: 19.6 (#256)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1422 | 1028 |
| ARC-AGI-2 | 2.5% | — |
| SimpleBench | 41.2% | — |
| Kagi LLM Benchmark | 56.8% | — |
| ARC-AGI-1 | 33.3% | — |
| CritPt | 1.1% | — |
| EnigmaEval | 2.7% | — |
| DTBench | 76.5% | — |
| LMCA | 27.5% | — |
| Epoch Capabilities Index | 143.03 | — |
| ForecastBench | 60.6 | — |

## Math

- Gemini 2.5 Flash: 39.9 (#98)
- Phi 3 Mini 128k Instruct: 31.6 (#222)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Math | 1415 | 1089 |
| OTIS Mock AIME 2024-2025 | 73.1% | — |
| Omni-MATH | 38.5% | — |
| FrontierMath (Feb 2025 set) | 4.8% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 2.5 Flash: 36.4 (#168)
- Phi 3 Mini 128k Instruct: 26.8 (#254)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Expert | 1426 | 984 |
| Humanity's Last Exam | 12.1% | — |
| MMLU-Pro | 63.9% | — |
| Confabulations | 16.8% | — |
| Vectara Hallucination Rate | 7.8% | — |
| GPQA (HELM) | 39% | — |

## Multimodal

- Gemini 2.5 Flash: 41.8 (#32)
- Phi 3 Mini 128k Instruct: —

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Vision | 1253 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |

## Multilingual

- Gemini 2.5 Flash: 52.3 (#88)
- Phi 3 Mini 128k Instruct: 25.2 (#285)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Non-English | 1409 | 1000 |
| LMArena Chinese | 1450 | 1016 |
| LMArena French | 1433 | 1039 |
| LMArena German | 1418 | 1006 |
| LMArena Japanese | 1405 | 899 |
| LMArena Korean | 1385 | 856 |
| LMArena Russian | 1415 | 1004 |
| LMArena Spanish | 1421 | 1059 |

## Instruction Following

- Gemini 2.5 Flash: 75.7 (#54)
- Phi 3 Mini 128k Instruct: 51.8 (#294)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Instruction Following | 1405 | 1023 |
| IFEval | 89.8% | — |

## Long Context

- Gemini 2.5 Flash: 47.5 (#17)
- Phi 3 Mini 128k Instruct: 30.4 (#289)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Longer Query | 1419 | 996 |
| Fiction.LiveBench | 77.8% | — |

## Writing & Preference

- Gemini 2.5 Flash: 53.8 (#157)
- Phi 3 Mini 128k Instruct: 27.1 (#301)

| Benchmark | Gemini 2.5 Flash | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Text | 1417 | 1050 |
| LMArena Creative Writing | 1400 | 1024 |
| LMArena Multi-Turn | 1408 | 989 |
| Short-Story Creative Writing | 76.5% | — |
| EQ-Bench Creative Writing | 1137 | — |
| WildBench | 81.7% | — |

## FAQ

### Is Gemini 2.5 Flash better than Phi 3 Mini 128k Instruct?

Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 29.7 on the Noometry Index.

### Is Gemini 2.5 Flash or Phi 3 Mini 128k Instruct better for coding?

Gemini 2.5 Flash scores higher on coding benchmarks: 35.8 versus 28.8 in the Noometry coding category.

### How many benchmarks do Gemini 2.5 Flash and Phi 3 Mini 128k Instruct share?

17 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.