# ERNIE 5.1 vs Mercury

> ERNIE 5.1 is the stronger model overall, scoring 43.8 to 37.6 on the Noometry Index.

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

## Summary

- They share 8 benchmarks with published results for both. ERNIE 5.1 scores higher in 6 categories and Mercury in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where ERNIE 5.1 leads 65.1 to 46.2.

## Snapshot

| | ERNIE 5.1 | Mercury |
|---|---|---|
| Provider | Baidu | Inception |
| Noometry Index | 43.8 | 37.6 |
| Rank | 83 | 199 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- ERNIE 5.1: 44.0 (#76)
- Mercury: 38.7 (#170)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Coding | 1488 | 1322 |

## Agentic & Tool Use

- ERNIE 5.1: —
- Mercury: —

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Search | 1227 | — |

## Reasoning

- ERNIE 5.1: 21.9 (#211)
- Mercury: 17.5 (#293)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Hard Prompts | 1481 | 1285 |
| Kagi LLM Benchmark | — | 21.6% |
| NYT Connections (extended) | 23.4% | — |

## Math

- ERNIE 5.1: 40.3 (#92)
- Mercury: —

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Math | 1481 | — |

## Knowledge

- ERNIE 5.1: 41.9 (#102)
- Mercury: —

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Expert | 1492 | — |

## Multilingual

- ERNIE 5.1: 55.5 (#29)
- Mercury: 41.6 (#206)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Non-English | 1454 | 1260 |
| LMArena Chinese | 1508 | — |
| LMArena French | 1488 | — |
| LMArena German | 1470 | — |
| LMArena Japanese | 1422 | — |
| LMArena Korean | 1427 | — |
| LMArena Russian | 1459 | — |
| LMArena Spanish | 1473 | — |

## Instruction Following

- ERNIE 5.1: 76.7 (#37)
- Mercury: 65.2 (#224)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Instruction Following | 1460 | 1239 |

## Long Context

- ERNIE 5.1: 44.7 (#59)
- Mercury: 38.4 (#198)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Longer Query | 1462 | 1266 |

## Writing & Preference

- ERNIE 5.1: 65.1 (#52)
- Mercury: 46.2 (#221)

| Benchmark | ERNIE 5.1 | Mercury |
|---|---|---|
| LMArena Text | 1468 | 1282 |
| LMArena Creative Writing | 1441 | 1191 |
| LMArena Multi-Turn | 1471 | 1282 |

## FAQ

### Is ERNIE 5.1 better than Mercury?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 37.6 on the Noometry Index.

### Is ERNIE 5.1 or Mercury better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 44.0 versus 38.7 in the Noometry coding category.

### How many benchmarks do ERNIE 5.1 and Mercury share?

8 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and Mercury has 9.