# ERNIE 5.1 vs o3-mini

> ERNIE 5.1 is the stronger model overall, scoring 43.1 to 36.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/ernie-5-1-vs-o3-mini
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. ERNIE 5.1 scores higher in 8 categories and o3-mini in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where ERNIE 5.1 leads 65.3 to 50.4.

## Snapshot

| | ERNIE 5.1 | o3-mini |
|---|---|---|
| Provider | Baidu | OpenAI |
| Noometry Index | 43.1 | 36.7 |
| Rank | 87 | 205 |
| Context | — | 200K |
| Input $/M | — | $1.10 |
| Output $/M | — | $4.40 |
| Weights | Proprietary | Proprietary |

## Coding

- ERNIE 5.1: 43.4 (#78)
- o3-mini: 41.4 (#116)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Coding | 1488 | 1378 |
| Aider Polyglot | — | 60.4% |
| SciCode | — | 39.8% |
| GSO | — | 1.3% |
| WeirdML | — | 43.7% |
| LiveBench Coding | — | 82.7% |
| CadEval | — | 54% |

## Agentic & Tool Use

- ERNIE 5.1: —
- o3-mini: 29.3 (#79)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| Cybench | — | 22.5% |
| LMArena Search | 1227 | — |

## Reasoning

- ERNIE 5.1: 20.9 (#209)
- o3-mini: 16.3 (#295)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Hard Prompts | 1481 | 1366 |
| ARC-AGI-2 | — | 3% |
| SimpleBench | — | 22.8% |
| NYT Connections (extended) | 23.4% | — |
| ARC-AGI-1 | — | 34.5% |
| CritPt | — | 0.3% |
| Chess Puzzles | — | 17% |
| LiveBench Reasoning | — | 89.6% |
| Mystery Game Puzzles | — | 7% |
| DTBench | — | 68.8% |
| LiveBench Data Analysis | — | 70.6% |
| LMCA | — | 19% |
| Epoch Capabilities Index | — | 140.35 |
| ForecastBench | — | 59.6 |
| LiveBench | — | 75.9% |

## Math

- ERNIE 5.1: 37.5 (#96)
- o3-mini: 27.6 (#236)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Math | 1481 | 1396 |
| FrontierMath (Tiers 1-3) | — | 18.6% |
| FrontierMath Tier 4 | — | 0% |
| OTIS Mock AIME 2024-2025 | — | 76.9% |
| LiveBench Math | — | 77.3% |
| MATH Level 5 | — | 96.5% |
| FrontierMath (Feb 2025 set) | — | 12.4% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- ERNIE 5.1: 41.2 (#103)
- o3-mini: 38.3 (#135)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Expert | 1491 | 1364 |
| GPQA Diamond | — | 77% |
| SimpleQA Verified | — | 15.3% |
| Confabulations | — | 17.9% |

## Multilingual

- ERNIE 5.1: 55.7 (#28)
- o3-mini: 45.9 (#159)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Non-English | 1455 | 1319 |
| LMArena Chinese | 1507 | 1379 |
| LMArena French | 1486 | 1333 |
| LMArena German | 1470 | 1303 |
| LMArena Japanese | 1422 | 1286 |
| LMArena Korean | 1428 | 1314 |
| LMArena Russian | 1459 | 1304 |
| LMArena Spanish | 1472 | 1321 |

## Instruction Following

- ERNIE 5.1: 76.9 (#35)
- o3-mini: 75.3 (#67)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Instruction Following | 1460 | 1338 |
| LiveBench Instruction Following | — | 84.4% |

## Long Context

- ERNIE 5.1: 44.7 (#56)
- o3-mini: 33.8 (#251)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Longer Query | 1462 | 1343 |
| Fiction.LiveBench | — | 50% |

## Writing & Preference

- ERNIE 5.1: 65.3 (#50)
- o3-mini: 50.4 (#177)

| Benchmark | ERNIE 5.1 | o3-mini |
|---|---|---|
| LMArena Text | 1468 | 1337 |
| LMArena Creative Writing | 1440 | 1286 |
| LMArena Multi-Turn | 1471 | 1320 |
| Short-Story Creative Writing | — | 61.7% |
| LiveBench Language | — | 50.7% |

## FAQ

### Is ERNIE 5.1 better than o3-mini?

ERNIE 5.1 is the stronger model overall, scoring 43.1 to 36.7 on the Noometry Index.

### Is ERNIE 5.1 or o3-mini better for coding?

ERNIE 5.1 scores higher on coding benchmarks: 43.4 versus 41.4 in the Noometry coding category.

### How many benchmarks do ERNIE 5.1 and o3-mini share?

17 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and o3-mini has 51.