Overview
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.
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 NUMBER129
- Release date
- 2026-08-28
- Organization
- Tencent Hy
- Family
- Hunyuan / Hy
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Specifications
Only published specifications are shown.
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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
New capabilities Deep reasoning Tool use Long-horizon agent Scientific research
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Architecture & capabilities
Attention
Gated DSAIndexCache
Key capabilities
Deep reasoningCodingTool useLong-horizon agentProfessional workScientific research
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Release history
Tencent released and open-sourced Hy4 preview.
View source06
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