# ERNIE 5.1 vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 43.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/ernie-5-1-vs-grok-4-5
- Last updated: 2026-10-12
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. ERNIE 5.1 scores higher in 2 categories and Grok 4.5 in 6 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 21.9.
- The biggest single-benchmark swing is NYT Connections (extended): 23.4% for ERNIE 5.1 and 79.9% for Grok 4.5.

## Snapshot

| | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| Provider | Baidu | xAI |
| Noometry Index | 43.8 | 55.0 |
| Rank | 83 | 25 |
| Context | — | 500K |
| Input $/M | — | $2 |
| Output $/M | — | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- ERNIE 5.1: 44.0 (#76)
- Grok 4.5: 52.2 (#35)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Coding | 1488 | 1474 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1553 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| ALE-Bench | — | 1,309 |

## Agentic & Tool Use

- ERNIE 5.1: —
- Grok 4.5: 44.4 (#17)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Search | 1227 | 1213 |
| APEX-Agents | — | 56.2% |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| Vending-Bench 2 | — | 3,887 |

## Reasoning

- ERNIE 5.1: 21.9 (#211)
- Grok 4.5: 56.1 (#25)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| NYT Connections (extended) | 23.4% | 79.9% |
| LMArena Hard Prompts | 1481 | 1462 |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| Kagi LLM Benchmark | — | 83.5% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| Chess Puzzles | — | 36% |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 153.92 |

## Math

- ERNIE 5.1: 40.3 (#92)
- Grok 4.5: 60.9 (#35)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Math | 1481 | 1459 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |

## Knowledge

- ERNIE 5.1: 41.9 (#102)
- Grok 4.5: 62.3 (#24)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Expert | 1492 | 1466 |
| GPQA Diamond | — | 93.4% |
| SimpleQA Verified | — | 48.3% |

## Multimodal

- ERNIE 5.1: —
- Grok 4.5: 37.6 (#72)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Vision | — | 1288 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |

## Multilingual

- ERNIE 5.1: 55.5 (#29)
- Grok 4.5: 54.4 (#42)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1454 | 1440 |
| LMArena Chinese | 1508 | 1496 |
| LMArena French | 1488 | 1456 |
| LMArena German | 1470 | 1446 |
| LMArena Japanese | 1422 | 1428 |
| LMArena Korean | 1427 | 1404 |
| LMArena Russian | 1459 | 1448 |
| LMArena Spanish | 1473 | 1450 |

## Instruction Following

- ERNIE 5.1: 76.7 (#37)
- Grok 4.5: 76.0 (#48)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1460 | 1446 |

## Long Context

- ERNIE 5.1: 44.7 (#59)
- Grok 4.5: 44.8 (#56)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1462 | 1463 |

## Writing & Preference

- ERNIE 5.1: 65.1 (#52)
- Grok 4.5: 65.8 (#42)

| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Text | 1468 | 1448 |
| LMArena Creative Writing | 1441 | 1442 |
| LMArena Multi-Turn | 1471 | 1456 |
| EQ-Bench Creative Writing | — | 1579 |

## FAQ

### Is ERNIE 5.1 better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 43.8 on the Noometry Index.

### Is ERNIE 5.1 or Grok 4.5 better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 44.0 in the Noometry coding category.

### How many benchmarks do ERNIE 5.1 and Grok 4.5 share?

19 benchmarks have published results for both models. ERNIE 5.1 has 19 scored results on Noometry and Grok 4.5 has 52.