# Gemini 3.1 Flash Lite vs Gemini 3.5 Flash Lite

> Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 1.5× less per token, which makes it the better buy when Gemini 3.5 Flash Lite's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-gemini-3-5-flash-lite
- Last updated: 2026-10-10
- Shared benchmarks: 31

## Summary

- They share 31 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 2 categories and Gemini 3.5 Flash Lite in 8 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 3.1 Flash Lite leads 39.5 to 25.7.
- The biggest single-benchmark swing is NYT Connections (extended): 8.2% for Gemini 3.1 Flash Lite and 60.4% for Gemini 3.5 Flash Lite.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $0.30 / $2.50 for Gemini 3.5 Flash Lite.

## Snapshot

| | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 40.4 | 41.8 |
| Rank | 141 | 113 |
| Context | 1.05M | 1.05M |
| Input $/M | $0.25 | $0.30 |
| Output $/M | $1.50 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Flash Lite: 37.5 (#179)
- Gemini 3.5 Flash Lite: 42.1 (#96)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena WebDev | 1256 | 1440 |
| SciCode | 41.9% | 41.3% |
| WeirdML | 52.2% | 39% |
| LMArena Coding | 1400 | 1455 |
| ALE-Bench | 797.73 | 765.27 |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- Gemini 3.5 Flash Lite: 28.6 (#82)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| DeepResearch Bench | 37.3% | — |
| GDP.pdf | — | 10% |

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- Gemini 3.5 Flash Lite: 27.8 (#95)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| NYT Connections (extended) | 8.2% | 60.4% |
| CritPt | 1.1% | 0% |
| Chess Puzzles | 25% | 22% |
| LMArena Hard Prompts | 1407 | 1441 |
| DTBench | 76.8% | 83.5% |
| LMCA | 35% | 37.6% |
| Epoch Capabilities Index | 144.45 | 145.12 |
| ARC-AGI-2 | — | 10.3% |
| Kagi LLM Benchmark | 67.2% | — |
| ARC-AGI-1 | — | 53.5% |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| Mystery Game Puzzles | — | 19% |
| ForecastBench | 54.4 | — |

## Math

- Gemini 3.1 Flash Lite: 39.5 (#82)
- Gemini 3.5 Flash Lite: 25.7 (#245)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| FrontierMath (Tiers 1-3) | 27.7% | 26% |
| OTIS Mock AIME 2024-2025 | 80% | 71.1% |
| LMArena Math | 1427 | 1431 |
| FrontierMath Tier 4 | — | 0% |
| ProofBench | — | 13% |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- Gemini 3.5 Flash Lite: 50.0 (#66)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| GPQA Diamond | 81.8% | 83.3% |
| LMArena Expert | 1397 | 1430 |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |

## Multimodal

- Gemini 3.1 Flash Lite: 38.7 (#57)
- Gemini 3.5 Flash Lite: 40.3 (#38)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Vision | 1240 | 1266 |

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- Gemini 3.5 Flash Lite: 53.8 (#59)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Non-English | 1410 | 1428 |
| LMArena Chinese | 1461 | 1467 |
| LMArena French | 1423 | 1452 |
| LMArena German | 1429 | 1454 |
| LMArena Japanese | 1411 | 1428 |
| LMArena Korean | 1393 | 1406 |
| LMArena Russian | 1420 | 1443 |
| LMArena Spanish | 1420 | 1440 |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- Gemini 3.5 Flash Lite: 75.0 (#77)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Instruction Following | 1376 | 1420 |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- Gemini 3.5 Flash Lite: 43.8 (#80)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Longer Query | 1394 | 1435 |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- Gemini 3.5 Flash Lite: 64.4 (#55)

| Benchmark | Gemini 3.1 Flash Lite | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Text | 1416 | 1436 |
| LMArena Creative Writing | 1401 | 1419 |
| LMArena Multi-Turn | 1417 | 1445 |
| EQ-Bench Creative Writing | — | 1559 |

## FAQ

### Is Gemini 3.1 Flash Lite better than Gemini 3.5 Flash Lite?

Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 1.5× less per token, which makes it the better buy when Gemini 3.5 Flash Lite's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.1 Flash Lite or Gemini 3.5 Flash Lite?

Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; Gemini 3.5 Flash Lite lists at $0.30 and $2.50.

### Is Gemini 3.1 Flash Lite or Gemini 3.5 Flash Lite better for coding?

Gemini 3.5 Flash Lite scores higher on coding benchmarks: 42.1 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 Gemini 3.5 Flash Lite share?

31 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Gemini 3.5 Flash Lite has 38.