Tencent launches Hy4 open-weight foundation model, entering top tier of Chinese open-weight AI and planning a Flash version.
| Source: Techmeme | Original article
Tencent has launched its Hy4 open-weight foundation model, saying it now ranks among the top tier of Chinese open-weight AI, and it has announced plans for a Flash version.
Tencent announced on Wednesday the launch of Hy4, its newest open‑weight foundation model, and positioned it as the first Chinese open‑weight system to reach the “top tier” of performance. The preview model, made publicly available for download, comprises 770 billion total parameters with 49 billion active parameters in a mixture‑of‑experts architecture, and supports a context window of more than one million tokens. In addition to standard language capabilities, Hy4 incorporates native visual processing and agentic computer‑use functions, allowing the model to interact with software tools and perform tasks that go beyond pure text generation.
The release marks a significant step in China’s open‑source AI race, where rivals such as DeepSeek, Z.ai and Alibaba have been scaling their own models. By open‑weighting Hy4, Tencent not only showcases its technical depth but also invites the broader research community to build on the model, potentially accelerating innovation across the region. The move underscores a broader shift toward openly shared large‑scale models, a trend we noted earlier this week when Chinese AI firms placed a $70 billion order for Nvidia RTX Pro 5500 chips, signalling the hardware appetite behind such endeavors.
Tencent said it will publish the full model weights and system cards in the coming days and is already planning a “Flash” variant that leverages ultra‑efficient attention mechanisms similar to those described in recent work on FLAMIA. The Flash version could lower inference costs and make Hy4 more accessible for real‑time applications.
What to watch next: benchmark results that compare Hy4’s performance against established global models, the timeline for the Flash release, and how quickly developers adopt the model in products ranging from chat assistants to enterprise tools. Regulatory responses and the competitive reaction from other Chinese AI labs will also shape how Hy4 influences the global AI landscape.
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