Tencent open-sources Hy4 Preview, a 770B-parameter AI model aimed at coding, office work, and research tasks

Tencent released Hy4 Preview, an open-source large language model with 770B total parameters, 49B active parameters, and a context window of more than 1M tokens. The model is available through Tencent apps including WorkBuddy and CodeBuddy, plus API access via Tencent Cloud TokenHub and OpenRouter, with limited-time free access at launch.

Tencent is positioning Hy4 Preview as a productivity-focused alternative in the increasingly competitive open-source AI model market. Its emphasis on long context, coding, and workplace tasks reflects a broader trend toward enterprise AI models optimized for practical workflows rather than general benchmarks alone.