# Mercury vs Yi-1.5-34B

> Mercury is the stronger model overall, scoring 37.6 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mercury-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. Mercury scores higher in 5 categories and Yi-1.5-34B in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where Mercury leads 41.6 to 32.3.
- Yi-1.5-34B has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury | Yi-1.5-34B |
|---|---|---|
| Provider | Inception | 01.AI |
| Noometry Index | 37.6 | 30.6 |
| Rank | 199 | 289 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Mercury: 38.7 (#170)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1322 | 1169 |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |

## Reasoning

- Mercury: 17.5 (#293)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1285 | 1160 |
| Kagi LLM Benchmark | 21.6% | — |

## Math

- Mercury: —
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Math | — | 1182 |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Mercury: —
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | — | 32% |
| LMArena Expert | — | 1144 |

## Multilingual

- Mercury: 41.6 (#206)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1260 | 1121 |
| LMArena Chinese | — | 1213 |
| LMArena French | — | 1156 |
| LMArena German | — | 1111 |
| LMArena Japanese | — | 1021 |
| LMArena Korean | — | 1005 |
| LMArena Russian | — | 1091 |
| LMArena Spanish | — | 1121 |

## Instruction Following

- Mercury: 65.2 (#224)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1239 | 1139 |

## Long Context

- Mercury: 38.4 (#198)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1266 | 1143 |

## Writing & Preference

- Mercury: 46.2 (#221)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Mercury | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1282 | 1173 |
| LMArena Creative Writing | 1191 | 1135 |
| LMArena Multi-Turn | 1282 | 1153 |

## FAQ

### Is Mercury better than Yi-1.5-34B?

Mercury is the stronger model overall, scoring 37.6 to 30.6 on the Noometry Index.

### Is Mercury or Yi-1.5-34B better for coding?

Mercury scores higher on coding benchmarks: 38.7 versus 32.4 in the Noometry coding category.

### How many benchmarks do Mercury and Yi-1.5-34B share?

8 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Yi-1.5-34B has 21.