Release dates
— Tencent released and open-sourced Hy4 preview. ↗
Hy4 preview
Tencent Hy’s next-generation 770B MoE flagship preview with 49B active parameters and a 1M context for coding, office analysis, game development, and research.
MODEL NUMBER186
- First public date
- 2026-08-28
- Organization
- Tencent Hy
- Family
- Hunyuan / Hy
01
Specifications
Only published specifications are shown.
- Total parameters
- 770B↗
- Active parameters
- 49B↗
- Architecture
- MoE↗
- Parameter scope
- Backbone parameters and MTP components are separate scopes; platform tensor totals are not treated as backbone parameters.↗
- Context
- 1,000,000 tokens
- Input modalities
- Text
- Output modalities
- Text
- Open weights
- Yes
- License
- Apache-2.0
- Status
- Preview
02
Overview
Why it mattered
Hy4 preview expands model scale, context, and training data, bringing Gated DSA, IndexCache, iHC, and native MTP into Hy’s open-model line.
PreviousHy3295B · 256K ctx
CurrentHy4 preview770B · 1M ctx
04
Architecture & capabilities
Attention
Gated DSAIndexCache
Model capabilities
Deep reasoningCodingTool useLong-horizon agentScientific research
Product features
Professional work
05
Release history
Tencent released and open-sourced Hy4 preview.
View source06
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07
Sources
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