# Gemini 3.8 Flash vs Phi-4

> Gemini 3.8 Flash is the stronger model overall, scoring 59.5 to 30.9 on the Noometry Index. Phi-4 costs 17× less per token, which makes it the better buy when Gemini 3.8 Flash's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-8-flash-vs-phi-4
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 9 categories and Phi-4 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 64.7 to 17.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 98.9% for Gemini 3.8 Flash and 13.8% for Phi-4.
- Phi-4 is cheaper at $0.07 / $0.14 per million input/output tokens, against $0.75 / $3.75 for Gemini 3.8 Flash.
- Gemini 3.8 Flash accepts more context: 1.05M tokens versus 128K.
- Phi-4 has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| Provider | Google | Microsoft |
| Noometry Index | 59.5 | 30.9 |
| Rank | 13 | 269 |
| Context | 1.05M | 128K |
| Input $/M | $0.75 | $0.07 |
| Output $/M | $3.75 | $0.14 |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.8 Flash: 56.4 (#17)
- Phi-4: 33.8 (#237)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Coding | 1512 | 1231 |
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| CursorBench | 39.6% | — |
| LMArena WebDev | 1581 | — |
| FrontierSWE | 19.6% | — |
| SciCode | 56.6% | — |
| BigCodeBench Instruct | — | 45.5% |
| LiveBench Coding | — | 30.7% |
| BigCodeBench Complete | — | 55.4% |
| ALE-Bench | 1,270 | — |

## Agentic & Tool Use

- Gemini 3.8 Flash: 40.3 (#22)
- Phi-4: 22.6 (#120)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| APEX-Agents | 64.3% | — |
| Berkeley Function Calling Leaderboard | — | 28.8% |
| BALROG | — | 11.6% |
| GDP.pdf | 23.4% | — |
| Vending-Bench 2 | 5,094 | — |

## Reasoning

- Gemini 3.8 Flash: 64.7 (#13)
- Phi-4: 17.0 (#287)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| Chess Puzzles | 61% | 1% |
| LMArena Hard Prompts | 1506 | 1220 |
| Epoch Capabilities Index | 157.13 | 130.43 |
| NYT Connections (extended) | 97.4% | — |
| CritPt | 18.3% | — |
| LiveBench Reasoning | — | 47.8% |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LiveBench Data Analysis | — | 45.2% |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
| LiveBench | — | 41.6% |

## Math

- Gemini 3.8 Flash: 65.2 (#22)
- Phi-4: 19.6 (#279)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 13.8% |
| LMArena Math | 1528 | 1246 |
| FrontierMath (Tiers 1-3) | 68.4% | — |
| FrontierMath Tier 4 | 22% | — |
| ProofBench | 48% | — |
| LiveBench Math | — | 42% |
| MATH Level 5 | — | 64.9% |

## Knowledge

- Gemini 3.8 Flash: 74.9 (#2)
- Phi-4: 32.5 (#204)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| GPQA Diamond | 95.4% | 56.1% |
| LMArena Expert | 1529 | 1203 |
| Humanity's Last Exam | 44.5% | — |
| SimpleQA Verified | 69.7% | — |
| Confabulations | — | 29.4% |
| Vectara Hallucination Rate | — | 3.7% |
| MMLU | — | 84.8% |

## Multimodal

- Gemini 3.8 Flash: 40.9 (#33)
- Phi-4: —

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Vision | 1312 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |

## Multilingual

- Gemini 3.8 Flash: 57.9 (#5)
- Phi-4: 37.4 (#232)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Non-English | 1486 | 1197 |
| LMArena Chinese | 1547 | 1211 |
| LMArena French | 1502 | 1223 |
| LMArena German | 1470 | 1222 |
| LMArena Japanese | 1505 | 1158 |
| LMArena Korean | 1479 | 1151 |
| LMArena Russian | 1507 | 1209 |
| LMArena Spanish | 1492 | 1234 |

## Instruction Following

- Gemini 3.8 Flash: 78.2 (#11)
- Phi-4: 60.6 (#246)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Instruction Following | 1489 | 1201 |
| LiveBench Instruction Following | — | 58.4% |

## Long Context

- Gemini 3.8 Flash: 46.2 (#23)
- Phi-4: 36.9 (#221)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Longer Query | 1506 | 1217 |

## Writing & Preference

- Gemini 3.8 Flash: 72.1 (#16)
- Phi-4: 40.7 (#239)

| Benchmark | Gemini 3.8 Flash | Phi-4 |
|---|---|---|
| LMArena Text | 1494 | 1217 |
| LMArena Creative Writing | 1485 | 1182 |
| LMArena Multi-Turn | 1503 | 1206 |
| Short-Story Creative Writing | — | 62.6% |
| EQ-Bench Creative Writing | 1748 | — |
| LiveBench Language | — | 25.6% |

## FAQ

### Is Gemini 3.8 Flash better than Phi-4?

Gemini 3.8 Flash is the stronger model overall, scoring 59.5 to 30.9 on the Noometry Index. Phi-4 costs 17× less per token, which makes it the better buy when Gemini 3.8 Flash's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.8 Flash or Phi-4?

Phi-4 is cheaper. It lists at $0.07 per million input tokens and $0.14 per million output tokens; Gemini 3.8 Flash lists at $0.75 and $3.75.

### Is Gemini 3.8 Flash or Phi-4 better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 56.4 versus 33.8 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.8 Flash does, with 1.05M tokens against 128K.

### How many benchmarks do Gemini 3.8 Flash and Phi-4 share?

21 benchmarks have published results for both models. Gemini 3.8 Flash has 46 scored results on Noometry and Phi-4 has 37.