Tencent Hunyuan has launched the Hy4 preview, a next-generation large language model with 770 billion total parameters and 49 billion activated parameters. The model features a context window that exceeds 1 million tokens.
The model is integrated into WorkBuddy, CodeBuddy, Yuanbao, and ima. API access is provided via Tencent Cloud TokenHub and OpenRouter. For a limited two-week period, WorkBuddy and CodeBuddy users will receive free access to the model.
Hy4 preview is tailored for productivity tasks such as scientific research, game development, data analysis, office work, and coding. The API is priced at $0.834 per million input tokens and $2.501 per million output tokens.
In an internal blind evaluation with 163 experts and 203 engineering tasks, Hy4 preview scored 2.99 out of 4, surpassing GLM 5.3 (2.92) and Kimi K3 (2.94). Additionally, Tencent reported that the model helped increase end-to-end throughput of its own training and inference systems by 31.8% compared to a baseline.