About this model or application
Tencent Hy3 and Hy4 preview are open-weight text MoE models for reasoning, coding and tool-using workflows. Their specifications separate backbone parameters from auxiliary MTP layers.
Family & other versions2 sources
Background for the family or other versions. These sources are counted separately from evidence for this release.
Model cards & docsOfficial
Hy4-preview official documentationFamily & other versions
Official model specifications and deployment information.
Model cards & docsOfficial
Hy3 official documentationFamily & other versions
Official model specifications and deployment information.
Model family catalog2
Current models
Official catalogHy4-previewPreview1M ContextOpen weights
- Model ID
tencent/Hy4-preview- Released
- Not stated
- Availability
- Preview
- Input
- Text
- Output
- Text
- Context
- 1,000,000 tokens
- Parameters
- 770B / 49B active
- Deployment / access
- Open weights · Local
- Weights
- Open weights
- License
- Apache-2.0
- Capabilities
- Reasoning · Tool use
770B total and 49B active exclude the MTP layer (10B total / 0.7B active). Preview can over-reason and over-verify.
Hy3Available256K ContextOpen weights
- Model ID
tencent/Hy3- Released
- Not stated
- Availability
- Available
- Input
- Text
- Output
- Text
- Context
- 256,000 tokens
- Parameters
- 295B / 21B active
- Deployment / access
- Open weights · Local
- Weights
- Open weights
- License
- Apache-2.0
- Capabilities
- Reasoning · Tool use
Official specifications separately list a 3.8B MTP layer.