# Gemini 3.1 Flash Lite vs Hy4 preview

> Hy4 preview is the stronger model overall, scoring 44.6 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 2.2× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-hy4-preview
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 0 categories and Hy4 preview in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 54.5 to 39.5.
- The biggest single-benchmark swing is NYT Connections (extended): 8.2% for Gemini 3.1 Flash Lite and 68.2% for Hy4 preview.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $0.83 / $2.50 for Hy4 preview.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| Provider | Google | Tencent |
| Noometry Index | 40.4 | 44.6 |
| Rank | 141 | 73 |
| Context | 1.05M | 1.05M |
| Input $/M | $0.25 | $0.83 |
| Output $/M | $1.50 | $2.50 |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.1 Flash Lite: 37.5 (#179)
- Hy4 preview: 51.4 (#36)

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena WebDev | 1256 | 1633 |
| SciCode | 41.9% | — |
| WeirdML | 52.2% | — |
| LMArena Coding | 1400 | — |
| ALE-Bench | 797.73 | — |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| DeepResearch Bench | 37.3% | — |

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- Hy4 preview: 30.6 (#75)

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | 8.2% | 68.2% |
| Kagi LLM Benchmark | 67.2% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 25% | — |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| LMArena Hard Prompts | 1407 | — |
| DTBench | 76.8% | — |
| LMCA | 35% | — |
| Epoch Capabilities Index | 144.45 | — |
| ForecastBench | 54.4 | — |

## Math

- Gemini 3.1 Flash Lite: 39.5 (#82)
- Hy4 preview: 54.5 (#37)

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 27.7% | — |
| OTIS Mock AIME 2024-2025 | 80% | — |
| ProofBench | — | 75% |
| LMArena Math | 1427 | — |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| GPQA Diamond | 81.8% | — |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |
| LMArena Expert | 1397 | — |

## Multimodal

- Gemini 3.1 Flash Lite: 38.7 (#57)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1410 | — |
| LMArena Chinese | 1461 | — |
| LMArena French | 1423 | — |
| LMArena German | 1429 | — |
| LMArena Japanese | 1411 | — |
| LMArena Korean | 1393 | — |
| LMArena Russian | 1420 | — |
| LMArena Spanish | 1420 | — |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1376 | — |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1394 | — |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- Hy4 preview: —

| Benchmark | Gemini 3.1 Flash Lite | Hy4 preview |
|---|---|---|
| LMArena Text | 1416 | — |
| LMArena Creative Writing | 1401 | — |
| LMArena Multi-Turn | 1417 | — |

## FAQ

### Is Gemini 3.1 Flash Lite better than Hy4 preview?

Hy4 preview is the stronger model overall, scoring 44.6 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 2.2× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.1 Flash Lite or Hy4 preview?

Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; Hy4 preview lists at $0.83 and $2.50.

### Is Gemini 3.1 Flash Lite or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 37.5 in the Noometry coding category.

### Which has the bigger context window?

Both accept 1.05M tokens.

### How many benchmarks do Gemini 3.1 Flash Lite and Hy4 preview share?

2 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Hy4 preview has 3.