Tencent Hy4 Preview Officially Launches on B.AI API, Fully Open for Access

According to Deep Tide TechFlow, the B.AI platform has announced that Tencent's Hunyuan team’s latest open-source flagship model, Hy4 Preview, is now officially available via API services and fully open for developer access. As an early version of the Hy4 series, this model adopts a 770B sparse MoE architecture, activates 49B parameters per token, and supports a 1M ultra-long context window. It demonstrates professional-grade performance in scenarios such as software engineering agents, office data workflows, game development, and scientific research. Starting today, developers can directly call Hy4 Preview through B.AI API’s official channels by visiting chat.b.ai/chat or accessing docs.b.ai/zh-Hans/llmservice/models/hy4-preview/ for more details and to experience it immediately. In the future, B.AI will continue to introduce cutting-edge models, providing developers with richer and more cost-effective AI computing power options.