According to CoinMeta, Hy4 and preview have undergone specialized optimizations, resulting in a significant reduction in the number of complex task rounds and token consumption. These improvements have now been fully implemented in workbuddy. Tencent stated that this optimization is mainly aimed at addressing issues related to lengthy thinking processes and excessive self-validation during complex tasks, ensuring that the effectiveness of the tasks is not compromised. Hy4 and preview are open-source flagship models released by Tencent at the end of August, with a total of 770 billion parameters and 49 billion activation parameters respectively. They are designed to handle long-duration tasks such as coding, office work, and scientific research.