# ERNIE 5.1 vs o3-pro

> ERNIE 5.1 and o3-pro score almost the same on the Noometry Index (43.8 vs 42.9), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/ernie-5-1-vs-o3-pro
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in long context, where o3-pro leads 72.2 to 44.7.

## Snapshot

| | ERNIE 5.1 | o3-pro |
|---|---|---|
| Provider | Baidu | OpenAI |
| Noometry Index | 43.8 | 42.9 |
| Rank | 83 | 105 |
| Context | — | 200K |
| Input $/M | — | $20 |
| Output $/M | — | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- ERNIE 5.1: 44.0 (#76)
- o3-pro: 55.5 (#24)

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |
| LMArena Coding | 1488 | — |

## Agentic & Tool Use

- ERNIE 5.1: —
- o3-pro: —

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| LMArena Search | 1227 | — |

## Reasoning

- ERNIE 5.1: 21.9 (#211)
- o3-pro: 23.8 (#171)

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| NYT Connections (extended) | 23.4% | — |
| ARC-AGI-1 | — | 59.3% |
| LMArena Hard Prompts | 1481 | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| Epoch Capabilities Index | — | 147.42 |

## Math

- ERNIE 5.1: 40.3 (#92)
- o3-pro: —

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| LMArena Math | 1481 | — |

## Knowledge

- ERNIE 5.1: 41.9 (#102)
- o3-pro: 29.5 (#238)

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1492 | — |

## Multilingual

- ERNIE 5.1: 55.5 (#29)
- o3-pro: —

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| LMArena Non-English | 1454 | — |
| 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)
- o3-pro: —

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| LMArena Instruction Following | 1460 | — |

## Long Context

- ERNIE 5.1: 44.7 (#59)
- o3-pro: 72.2 (#1)

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1462 | — |

## Writing & Preference

- ERNIE 5.1: 65.1 (#52)
- o3-pro: 57.1 (#133)

| Benchmark | ERNIE 5.1 | o3-pro |
|---|---|---|
| LMArena Text | 1468 | — |
| LMArena Creative Writing | 1441 | — |
| Short-Story Creative Writing | — | 84.4% |
| LMArena Multi-Turn | 1471 | — |

## FAQ

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

ERNIE 5.1 and o3-pro score almost the same on the Noometry Index (43.8 vs 42.9), so choose on price, context window or the category you care about most.

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

o3-pro scores higher on coding benchmarks: 55.5 versus 44.0 in the Noometry coding category.

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

0 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and o3-pro has 12.