Hy3 Preview: The First Open-Source Release After the Reconstruction of Yuan, with Enhanced Comprehensive Practicality and Agent Capabilities
Tencent Yuan released and open-sourced the Hy3preview language model on April 23. This is a Mixture of Experts model that combines fast and slow thinking, with a total of 295B parameters and 21B activated parameters, supporting a context length of 256K. As the first model trained after the reconstruction, it significantly improves in complex reasoning, instruction following, context learning, code generation, and agent capabilities, making it the most intelligent model in the history of Yuan. In February 2026, Tencent Yuan reconstructed its pre-training and reinforcement learning infrastructure, focusing on the practicality of the model.
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