# Claude Opus 4.1 vs ERNIE 5.1

> ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-ernie-5-1
- Last updated: 2026-10-12
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Claude Opus 4.1 scores higher in 3 categories and ERNIE 5.1 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where ERNIE 5.1 leads 40.3 to 22.3.

## Snapshot

| | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| Provider | Anthropic | Baidu |
| Noometry Index | 41.0 | 43.8 |
| Rank | 142 | 83 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.1: 44.4 (#73)
- ERNIE 5.1: 44.0 (#76)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Coding | 1479 | 1488 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 35.0 (#41)
- ERNIE 5.1: —

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Search | 1148 | 1227 |
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 32.2 (#76)
- ERNIE 5.1: 21.9 (#211)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1481 |
| SimpleBench | 60% | — |
| NYT Connections (extended) | — | 23.4% |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.12 | — |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.3 (#277)
- ERNIE 5.1: 40.3 (#92)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Math | 1431 | 1481 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.1: 42.0 (#101)
- ERNIE 5.1: 41.9 (#102)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Expert | 1439 | 1492 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |

## Multimodal

- Claude Opus 4.1: 26.8 (#119)
- ERNIE 5.1: —

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.0 (#95)
- ERNIE 5.1: 55.5 (#29)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Non-English | 1405 | 1454 |
| LMArena Chinese | 1427 | 1508 |
| LMArena French | 1431 | 1488 |
| LMArena German | 1413 | 1470 |
| LMArena Japanese | 1378 | 1422 |
| LMArena Korean | 1380 | 1427 |
| LMArena Russian | 1422 | 1459 |
| LMArena Spanish | 1448 | 1473 |

## Instruction Following

- Claude Opus 4.1: 75.6 (#58)
- ERNIE 5.1: 76.7 (#37)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Instruction Following | 1435 | 1460 |

## Long Context

- Claude Opus 4.1: 44.5 (#63)
- ERNIE 5.1: 44.7 (#59)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Longer Query | 1455 | 1462 |

## Writing & Preference

- Claude Opus 4.1: 62.4 (#74)
- ERNIE 5.1: 65.1 (#52)

| Benchmark | Claude Opus 4.1 | ERNIE 5.1 |
|---|---|---|
| LMArena Text | 1419 | 1468 |
| LMArena Creative Writing | 1412 | 1441 |
| LMArena Multi-Turn | 1444 | 1471 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

### Is Claude Opus 4.1 better than ERNIE 5.1?

ERNIE 5.1 is the stronger model overall, scoring 43.8 to 41.0 on the Noometry Index.

### Is Claude Opus 4.1 or ERNIE 5.1 better for coding?

They score almost the same on coding (44.4 vs 44.0); test both on your own repository before choosing.

### How many benchmarks do Claude Opus 4.1 and ERNIE 5.1 share?

18 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and ERNIE 5.1 has 19.