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ERNIE 4.5 vs Hy4 preview

Hy4 preview leads the LLM Stats Score 51.0 to -13.4.

Baidu · Tencent · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.0 to -13.4, ranking #14 overall.

In the 1 individual benchmarks reported for both models, Hy4 preview wins 1; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose ERNIE 4.5

  • you want predictable pricing at $0.40/M input and $4.00/M output

Choose Hy4 preview

  • overall performance matters — it scores 51.0 and ranks #14 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

ERNIE 4.5
Baidu
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
-13.4
#369
51.0
#14
Reasoning
-13.4
#363
50.8
#10
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$0.40 / M
— / M
Output price
$4.00 / M
— / M
Context window
128,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
ERNIE 4.5
Hy4 preview
Math
-16.3#327
41.0#11
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

20 reported for ERNIE 4.5 · 32 for Hy4 preview

1 shared

ERNIE 4.5 outperforms in 0 benchmarks, while Hy4 preview is better at 1 benchmark (GPQA).

Hy4 preview significantly outperforms across most benchmarks.

Mon Sep 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

749.0B diff

Hy4 preview has 749.0B more parameters than ERNIE 4.5, making it 3566.7% larger.

Baidu
ERNIE 4.5
21.0Bparameters
Tencent
Hy4 preview
770.0Bparameters
21.0B
ERNIE 4.5
770.0B
Hy4 preview

Context Window

Maximum input and output token capacity

Only ERNIE 4.5 specifies input context (128,000 tokens). Only ERNIE 4.5 specifies output context (65,536 tokens).

Baidu
ERNIE 4.5
Input128,000 tokens
Output65,536 tokens
Tencent
Hy4 preview
Input- tokens
Output- tokens
Mon Sep 21 2026 • llm-stats.com

License

Usage and distribution terms

ERNIE 4.5 is licensed under a proprietary license, while Hy4 preview uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

ERNIE 4.5

Proprietary

Closed source

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

ERNIE 4.5 was released on 2025-06-25, while Hy4 preview was released on 2026-08-28.

Hy4 preview is 14 months newer than ERNIE 4.5.

ERNIE 4.5

Jun 25, 2025

1.2 years ago

Hy4 preview

Aug 28, 2026

3 weeks ago

1.2yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against ERNIE 4.5 and Hy4 preview side-by-side, then vote on the output you prefer.

ERNIE 4.5
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about ERNIE 4.5 vs Hy4 preview.

Which is better, ERNIE 4.5 or Hy4 preview?

Hy4 preview leads the LLM Stats Score 51.0 to -13.4. ERNIE 4.5 is made by Baidu and Hy4 preview is made by Tencent. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does ERNIE 4.5 compare to Hy4 preview in benchmarks?

ERNIE 4.5 scores GPQA: 74.0%, ARC-E: 60.7%, PIQA: 55.2%, Winogrande: 51.3%, CLUEWSC: 48.6%. Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%.

What are the context window sizes for ERNIE 4.5 and Hy4 preview?

ERNIE 4.5 supports 128K tokens and Hy4 preview supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between ERNIE 4.5 and Hy4 preview?

Key differences include LLM Stats Score (-13.4 vs 51.0), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes ERNIE 4.5 and Hy4 preview?

ERNIE 4.5 is developed by Baidu and Hy4 preview is developed by Tencent.

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