# Gemini 2.5 Flash vs Qwen1.5 4b Chat

> Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-vs-qwen1-5-4b-chat
- Last updated: 2026-10-12
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 7 categories and Qwen1.5 4b Chat in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Gemini 2.5 Flash leads 53.8 to 23.8.
- Qwen1.5 4b Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| Provider | Google | Alibaba (Qwen) |
| Noometry Index | 39.3 | 28.8 |
| Rank | 170 | 322 |
| Context | 1.05M | — |
| Input $/M | $0.30 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Gemini 2.5 Flash: 35.8 (#220)
- Qwen1.5 4b Chat: 29.1 (#308)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Coding | 1424 | 999 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| WeirdML | 41.9% | — |
| ALE-Bench | 661.88 | — |

## Agentic & Tool Use

- Gemini 2.5 Flash: 30.8 (#74)
- Qwen1.5 4b Chat: —

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| 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)
- Qwen1.5 4b Chat: 18.5 (#279)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Hard Prompts | 1422 | 976 |
| 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)
- Qwen1.5 4b Chat: 30.4 (#234)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Math | 1415 | 1026 |
| 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)
- Qwen1.5 4b Chat: 26.7 (#255)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Expert | 1426 | 980 |
| 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)
- Qwen1.5 4b Chat: —

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Vision | 1253 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |

## Multilingual

- Gemini 2.5 Flash: 52.3 (#88)
- Qwen1.5 4b Chat: 24.1 (#290)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Non-English | 1409 | 979 |
| LMArena Chinese | 1450 | 1024 |
| LMArena German | 1418 | 902 |
| LMArena Russian | 1415 | 952 |
| LMArena French | 1433 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1385 | — |
| LMArena Spanish | 1421 | — |

## Instruction Following

- Gemini 2.5 Flash: 75.7 (#54)
- Qwen1.5 4b Chat: 49.0 (#300)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Instruction Following | 1405 | 978 |
| IFEval | 89.8% | — |

## Long Context

- Gemini 2.5 Flash: 47.5 (#17)
- Qwen1.5 4b Chat: 30.1 (#290)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Longer Query | 1419 | 988 |
| Fiction.LiveBench | 77.8% | — |

## Writing & Preference

- Gemini 2.5 Flash: 53.8 (#157)
- Qwen1.5 4b Chat: 23.8 (#309)

| Benchmark | Gemini 2.5 Flash | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Text | 1417 | 997 |
| LMArena Creative Writing | 1400 | 969 |
| LMArena Multi-Turn | 1408 | 977 |
| Short-Story Creative Writing | 76.5% | — |
| EQ-Bench Creative Writing | 1137 | — |
| WildBench | 81.7% | — |

## FAQ

### Is Gemini 2.5 Flash better than Qwen1.5 4b Chat?

Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 28.8 on the Noometry Index.

### Is Gemini 2.5 Flash or Qwen1.5 4b Chat better for coding?

Gemini 2.5 Flash scores higher on coding benchmarks: 35.8 versus 29.1 in the Noometry coding category.

### How many benchmarks do Gemini 2.5 Flash and Qwen1.5 4b Chat share?

13 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Qwen1.5 4b Chat has 13.