Tencent Hunyuan releases and open-sources Hy4 preview
Tencent Hunyuan releases Hy4 preview with public model weights and deployment code.
What happened
Event details
Hy4 preview is released as a text-generation model. Its official repository and model card provide public weights, an Apache 2.0 license and self-deployment instructions.
Assessment
Why it matters
The model uses a 770B-parameter MoE architecture, provides a one-million-token context window, and publishes weights and deployment code under Apache 2.0, giving it strong technical and developer-ecosystem impact. As a preview, its long-term impact remains uncertain.
Availability
Access notes
Hy4 preview is open source and available in products including WorkBuddy and CodeBuddy. Their two-week free trial runs approximately from August 28 to September 11, 2026 Beijing time, subject to the campaign page. Hy3's free trial is extended through September 30.