Hunyuan Hy4 preview
Canonical page on the main site: sinoaihub.com/models/hunyuan-hy4-preview
Type
model
Definition
Hunyuan Hy4 preview is a Tencent model in the Hunyuan Hy family: Mixture-of-Experts: 770B total / 49B active (6.4%), 78 layers (1 dense FFN + 77 MoE), 256 routed + 1 shared expert per layer, top-8 routing, Gated DeepSeek Sparse Attention with IndexCache, plus one native MTP layer (10B total / 0.7B active) for speculative decoding; 1,000,000-token context window; open-weight; Apache-2.0 license; released 2026-08-28.
Key facts
- Architecture: Mixture-of-Experts: 770B total / 49B active (6.4%), 78 layers (1 dense FFN + 77 MoE), 256 routed + 1 shared expert per layer, top-8 routing, Gated DeepSeek Sparse Attention with IndexCache, plus one native MTP layer (10B total / 0.7B active) for speculative decoding
- Context window: 1,000,000 tokens (max output not published)
- Weights: open; Apache-2.0 license
- API pricing: $0.834 input / $2.501 output per 1M tokens (USD); $0.042 per 1M cached input
- Released: 2026-08-28
- Capabilities: reasoning, coding, math, chinese, english, multilingual, tool_calling, function_calling, agent_capability
Provider
Model Family
Hunyuan Hy
Release Date
2026-08-28
Status
preview
Architecture
Mixture-of-Experts: 770B total / 49B active (6.4%), 78 layers (1 dense FFN + 77 MoE), 256 routed + 1 shared expert per layer, top-8 routing, Gated DeepSeek Sparse Attention with IndexCache, plus one native MTP layer (10B total / 0.7B active) for speculative decoding
Parameter Information
- total_parameters: 770B
- active_parameters: 49B
- parameter_precision: BF16 open weights; separate FP8 quantized release
Context Window
1000000
Maximum Output
Not published
Capabilities
- reasoning: Yes
- coding: Yes
- math: Yes
- chinese: Yes
- english: Yes
- multilingual: Yes
- vision: No
- audio: No
- video: No
- tool_calling: Yes
- function_calling: Yes
- agent_capability: Yes
Open Weight
Yes
License
Apache-2.0
Self Hosting
Yes
Api Available
Yes
Pricing
- input_price_per_1m: 0.834
- output_price_per_1m: 2.501
- currency: USD
- effective_date: 2026-08-28
- pricing_ref: tencent
Official Api
Yes
Cloud Providers
- Tencent Cloud TokenHub
- OpenRouter
Regions
- china
- international
Benchmark Results
| benchmark | score | metric | date | source_type | source_url |
|---|---|---|---|---|---|
| Tencent internal blind evaluation (163 experts, 203 engineering tasks) | 2.99 | mean rating out of 4.00 | 2026-08-28 | vendor_reported | https://www.tencent.com/zh-cn/tencent-releases-and-open-sources-tencent-hy4-preview/ |
Known Limitations
- Tencent states the preview over-reasons on complex tasks and tends to over-verify its own work
- Early preview — Tencent says both pre-training and post-training have headroom left
- Maximum output length is not published
- Text-only in the preview; visual understanding was announced for the next Hy4 generation, not this one
- No independent suite is recorded here — the only published comparative result is Tencent's own internal blind evaluation
Verification Status
verified
License Changes
No documented license changes on record as of 2026-10-31.
Last Verified
2026-10-31
Source history
No documented source-change events located as of 2026-10-31.
Sources
| evidence_id | source_name | source_url | source_type | published | verified | confidence | conflict |
|---|---|---|---|---|---|---|---|
| src-models-hy4-1 | Tencent — Hy4 preview release announcement | https://www.tencent.com/zh-cn/tencent-releases-and-open-sources-tencent-hy4-preview/ | Official | 2026-08-28 | 2026-10-31 | high | — |
| src-models-hy4-2 | Hy4 preview model card (Hugging Face) | https://huggingface.co/tencent/Hy4-preview | Official | — | 2026-10-31 | high | — |
| src-models-hy4-3 | Hy4 preview model card — Chinese (README_CN) | https://huggingface.co/tencent/Hy4-preview/blob/main/README_CN.md | Official | — | 2026-10-31 | high | — |
| src-models-hy4-4 | Tencent Hy research site — Hy4 | https://hy.tencent.com/research/hy4-preview | Official | — | 2026-10-31 | medium | Page did not render for extraction; cited for existence only |
| src-models-hy4-5 | 智东西 — 汤道生预告混元Hy4，首次加入视觉理解 | https://news.qq.com/rain/a/20261030A0000M00 | Industry media | 2026-10-30 | 2026-10-31 | medium | Vision and flash variant described as forthcoming, not shipped |
| src-models-hy4-6 | 财联社 — Hy4 preview 开源，下一版模型近期上线 | https://cls.cn/detail/2467904 | Industry media | 2026-08-28 | 2026-10-31 | medium | — |