Hy4 preview
Tencent · · 53 days after Hy3
Verified
3 of 3 published values traced to a source2 primary sources, 2 archived
Why this status
Newly added. Sources are not archived and no value has been traced to one yet — run `npm run enrich`.
What these states mean · How records are judged · Has this record changed?
Tencent released and open-sourced Hy4 preview for coding, office work and scientific research: 770 billion total parameters, 49 billion active, and a context window Tencent describes as exceeding 1M tokens (1,048,576 in the published config). Available on WorkBuddy, CodeBuddy, Yuanbao and ima, and by API through Tencent Cloud TokenHub and OpenRouter.
Details
| Released | August 28, 2026stated in huggingface.coHy4 preview was released on August 28, 2026.
|
|---|---|
| Company | Tencent |
| Family | Hy |
| Lineage | after Hy3 |
| Era | Agentic systems |
| Type | Language model · LLM |
| Modalities | Not recorded |
| Capabilities | Coding, Agentic |
| Weights | Open weights |
| Licence | Apache-2.0 |
| Context window | 1.05M tokensstated in huggingface.coHy4 preview supports a context window of 1,048,576 tokens.
|
| Parameters | 770Bstated in huggingface.coHy4 preview has 770,000,000,000 parameters.
|
Current information, elsewhere
This record is a historical one: every figure above is traced to a dated primary source. For what is true today — live pricing, current rankings, availability — these are better maintained than anything here could be.
- Current price and providers OpenRouter ↗
- Current benchmark scores Artificial Analysis ↗
- Weights and model card Hugging Face ↗
Sources
Record status: verified · confidence 90/100 · 2 of 2 primary
Newly added. Sources are not archived and no value has been traced to one yet — run `npm run enrich`.
- tencent.com Official announcement archived
- huggingface.co Model card archived
Primary means published by the organisation that made the model. Verified records require at least one.
Hy family
- Hy3 preview April 24, 2026
- Hy-MT2-1.8B May 21, 2026
- Hy-MT2-7B May 21, 2026
- Hy-MT2-30B-A3B May 21, 2026
- Hy3 July 6, 2026
- Hy4 preview August 28, 2026
What changed from Hy3
Compared with the previous release in this series. A field appears only when both records state a value — where one does not, it is listed as uncomparable rather than dropped, because a gap in our research is not a finding about the model.
- Context window262K → 1.05M
- Parameters295B → 770B
Not comparable: Capabilities and modalities (not researched on both releases)
Compare Hy4 preview with another model →
See Hy4 preview on the interactive timeline →