# Gemma 2 9B vs Yi-Lightning

> Yi-Lightning is the stronger model overall, scoring 37.1 to 25.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-2-9b-vs-yi-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Gemma 2 9B scores higher in 1 category and Yi-Lightning in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Yi-Lightning leads 36.2 to 9.9.
- Gemma 2 9B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| Provider | Google | 01.AI |
| Noometry Index | 25.9 | 37.1 |
| Rank | 341 | 209 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Gemma 2 9B: 29.4 (#304)
- Yi-Lightning: 27.4 (#320)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1173 | 1312 |
| Aider Polyglot | — | 12.9% |
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| BigCodeBench Complete | 40.6% | — |

## Reasoning

- Gemma 2 9B: 15.9 (#309)
- Yi-Lightning: 25.9 (#139)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1171 | 1302 |
| LiveBench Reasoning | 15.2% | — |
| LiveBench Data Analysis | 36.4% | — |
| Epoch Capabilities Index | 119.83 | — |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |

## Math

- Gemma 2 9B: 9.9 (#318)
- Yi-Lightning: 36.2 (#172)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Math | 1183 | 1300 |
| OTIS Mock AIME 2024-2025 | 0.6% | — |
| LiveBench Math | 19.8% | — |
| MATH Level 5 | 21% | — |
| GSM8K | 84.9% | — |

## Knowledge

- Gemma 2 9B: 9.7 (#305)
- Yi-Lightning: 35.4 (#185)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1147 | 1286 |
| GPQA Diamond | 27.5% | — |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |

## Multilingual

- Gemma 2 9B: 36.6 (#238)
- Yi-Lightning: 42.2 (#196)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1188 | 1269 |
| LMArena Chinese | 1185 | 1320 |
| LMArena French | 1190 | 1305 |
| LMArena German | 1186 | 1267 |
| LMArena Japanese | 1144 | 1228 |
| LMArena Korean | 1137 | 1192 |
| LMArena Russian | 1200 | 1255 |
| LMArena Spanish | 1200 | 1315 |

## Instruction Following

- Gemma 2 9B: 57.6 (#269)
- Yi-Lightning: 67.4 (#196)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1178 | 1278 |
| LiveBench Instruction Following | 52.6% | — |

## Long Context

- Gemma 2 9B: 36.3 (#233)
- Yi-Lightning: 39.4 (#181)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1197 | 1297 |

## Writing & Preference

- Gemma 2 9B: 32.1 (#281)
- Yi-Lightning: 50.2 (#184)

| Benchmark | Gemma 2 9B | Yi-Lightning |
|---|---|---|
| LMArena Text | 1207 | 1302 |
| LMArena Creative Writing | 1206 | 1280 |
| LMArena Multi-Turn | 1193 | 1311 |
| EQ-Bench Creative Writing | 841 | — |
| LiveBench Language | 25.5% | — |

## FAQ

### Is Gemma 2 9B better than Yi-Lightning?

Yi-Lightning is the stronger model overall, scoring 37.1 to 25.9 on the Noometry Index.

### Is Gemma 2 9B or Yi-Lightning better for coding?

Gemma 2 9B scores higher on coding benchmarks: 29.4 versus 27.4 in the Noometry coding category.

### How many benchmarks do Gemma 2 9B and Yi-Lightning share?

17 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and Yi-Lightning has 18.