Model comparison
ERNIE 5.1 vs Hy4 preview
Hy4 preview is the stronger model overall, scoring 45.3 to 43.8 on the Noometry Index.
Last verified . 1 shared benchmarks.
Baidu
TencentSummary
- They share 1 benchmark with published results for both. ERNIE 5.1 scores higher in 0 categories and Hy4 preview in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 55.7 to 40.3.
- The biggest single-benchmark swing is NYT Connections (extended): 23.4% for ERNIE 5.1 and 68.2% for Hy4 preview.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| ERNIE 5.1 | Hy4 preview | |
|---|---|---|
| Provider | Baidu | Tencent |
| Noometry Index | 43.8 | 45.3 |
| Released | — | 2026-08-28 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 64K |
| Input $ / M tokens | — | $0.75 |
| Output $ / M tokens | — | $2.25 |
| Results tracked | 19 | 3 |
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Category by category
Coding Hy4 preview leads
ERNIE 5.1: 44.0 (#76), Hy4 preview: 51.6 (#38)
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1632 |
| LMArena Coding | 1488 | — |
Agentic & Tool Use Not comparable
ERNIE 5.1: —, Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena Search | 1227 | — |
Reasoning Hy4 preview leads
ERNIE 5.1: 21.9 (#211), Hy4 preview: 31.9 (#79)
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | 23.4% | 68.2% |
| LMArena Hard Prompts | 1481 | — |
Math Hy4 preview leads
ERNIE 5.1: 40.3 (#92), Hy4 preview: 55.7 (#42)
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| LMArena Math | 1481 | — |
Knowledge Not comparable
ERNIE 5.1: 41.9 (#102), Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena Expert | 1492 | — |
Multilingual Not comparable
ERNIE 5.1: 55.5 (#29), Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| 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 Not comparable
ERNIE 5.1: 76.7 (#37), Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1460 | — |
Long Context Not comparable
ERNIE 5.1: 44.7 (#59), Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1462 | — |
Writing & Preference Not comparable
ERNIE 5.1: 65.1 (#52), Hy4 preview: —
| Benchmark | ERNIE 5.1 | Hy4 preview |
|---|---|---|
| LMArena Text | 1468 | — |
| LMArena Creative Writing | 1441 | — |
| LMArena Multi-Turn | 1471 | — |
Frequently asked questions
Is ERNIE 5.1 better than Hy4 preview?
Hy4 preview is the stronger model overall, scoring 45.3 to 43.8 on the Noometry Index.
Is ERNIE 5.1 or Hy4 preview better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 44.0 in the Noometry coding category.
How many benchmarks do ERNIE 5.1 and Hy4 preview share?
1 benchmark has published results for both models. ERNIE 5.1 has 19 scored results on Noometry and Hy4 preview has 3.