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Atria Dawn Preview vs Hy4 preview

Atria Dawn Preview and Hy4 preview are closely matched at 52.3 and 51.0 on the LLM Stats Score.

Shanghai AI Laboratory · Tencent · Updated for 2026

Which is better?

Atria Dawn Preview and Hy4 preview are closely matched on the overall LLM Stats Score at 52.3 and 51.0.

In the 7 individual benchmarks reported for both models, Hy4 preview wins 4; 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 Atria Dawn Preview

  • you want the most recent training data — it shipped Sep 2026

Choose Hy4 preview

  • you value its reported benchmark strengths — it wins 4 of 7 exact shared results

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
52.3
#10
51.0
#14
Reasoning
50.5
#12
50.8
#10
Coding
36.2
#22
39.7
#14
Agents
38.8
#10
36.7
#16
Cost, coverage & limits
Benchmark wins
3 of 7
4 of 7
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Atria Dawn Preview
Hy4 preview
Tool use
31.1#12
30.9#14
Research
36.1#1
28.2#6
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 32 for Hy4 preview

7 shared

Atria Dawn Preview outperforms in 3 benchmarks (AutomationBench, CyberGym, SkillsBench), while Hy4 preview is better at 4 benchmarks (GDPval-AA, SWE-Bench Pro, Terminal-Bench 2.1, WideSearch).

Hy4 preview has a slight edge in benchmark performance.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

26.0B diff

Hy4 preview has 26.0B more parameters than Atria Dawn Preview, making it 3.5% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Tencent
Hy4 preview
770.0Bparameters
744.0B
Atria Dawn Preview
770.0B
Hy4 preview

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Hy4 preview uses Apache 2.0.

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

Atria Dawn Preview

MIT

Open weights

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Hy4 preview was released on 2026-08-28.

Atria Dawn Preview is 0 month newer than Hy4 preview.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

2w newer
Hy4 preview

Aug 28, 2026

3 weeks ago

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 Atria Dawn Preview and Hy4 preview side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Hy4 preview.

Which is better, Atria Dawn Preview or Hy4 preview?

Atria Dawn Preview and Hy4 preview are closely matched on the LLM Stats Score at 52.3 and 51.0. Atria Dawn Preview is made by Shanghai AI Laboratory 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 Atria Dawn Preview compare to Hy4 preview in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. 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 main differences between Atria Dawn Preview and Hy4 preview?

Key differences include LLM Stats Score (52.3 vs 51.0), licensing (MIT vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Hy4 preview?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Hy4 preview is developed by Tencent.

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