# Gemini 3.1 Flash Lite vs Mercury

> Gemini 3.1 Flash Lite is the stronger model overall, scoring 40.8 to 37.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-mercury
- Last updated: 2026-10-10
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 5 categories and Mercury in 1 category; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Gemini 3.1 Flash Lite leads 60.9 to 46.2.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 67.2% for Gemini 3.1 Flash Lite and 21.6% for Mercury.

## Snapshot

| | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| Provider | Google | Inception |
| Noometry Index | 40.8 | 37.6 |
| Rank | 144 | 199 |
| Context | 1.05M | — |
| Input $/M | $0.25 | — |
| Output $/M | $1.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Flash Lite: 37.8 (#188)
- Mercury: 38.7 (#170)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Coding | 1400 | 1322 |
| LMArena WebDev | 1256 | — |
| SciCode | 41.9% | — |
| WeirdML | 52.2% | — |
| ALE-Bench | 797.73 | — |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 30.2 (#79)
- Mercury: —

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

## Reasoning

- Gemini 3.1 Flash Lite: 22.9 (#186)
- Mercury: 17.5 (#293)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| Kagi LLM Benchmark | 67.2% | 21.6% |
| LMArena Hard Prompts | 1407 | 1285 |
| NYT Connections (extended) | 8.2% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 25% | — |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| DTBench | 76.8% | — |
| LMCA | 35% | — |
| Epoch Capabilities Index | 144.47 | — |
| ForecastBench | 54.4 | — |

## Math

- Gemini 3.1 Flash Lite: 40.7 (#90)
- Mercury: —

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| FrontierMath (Tiers 1-3) | 27.7% | — |
| OTIS Mock AIME 2024-2025 | 80% | — |
| LMArena Math | 1428 | — |

## Knowledge

- Gemini 3.1 Flash Lite: 41.9 (#104)
- Mercury: —

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| GPQA Diamond | 81.8% | — |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |
| LMArena Expert | 1398 | — |

## Multimodal

- Gemini 3.1 Flash Lite: 39.4 (#60)
- Mercury: —

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Gemini 3.1 Flash Lite: 52.3 (#86)
- Mercury: 41.6 (#206)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Non-English | 1411 | 1260 |
| LMArena Chinese | 1461 | — |
| LMArena French | 1424 | — |
| LMArena German | 1429 | — |
| LMArena Japanese | 1413 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1420 | — |
| LMArena Spanish | 1421 | — |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.7 (#131)
- Mercury: 65.2 (#224)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Instruction Following | 1377 | 1239 |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#122)
- Mercury: 38.4 (#198)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Longer Query | 1394 | 1266 |

## Writing & Preference

- Gemini 3.1 Flash Lite: 60.9 (#94)
- Mercury: 46.2 (#221)

| Benchmark | Gemini 3.1 Flash Lite | Mercury |
|---|---|---|
| LMArena Text | 1416 | 1282 |
| LMArena Creative Writing | 1401 | 1191 |
| LMArena Multi-Turn | 1417 | 1282 |

## FAQ

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

Gemini 3.1 Flash Lite is the stronger model overall, scoring 40.8 to 37.6 on the Noometry Index.

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

They score almost the same on coding (37.8 vs 38.7); test both on your own repository before choosing.

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

9 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Mercury has 9.