On August 28, 2026, Tencent Hunyuan introduced and made open-source its latest large language model, the Hy4 preview. This model boasts an impressive 770 billion parameters in total, with 49 billion active parameters, and a context length that surpasses 1 million. It demonstrates exceptional proficiency in practical productivity tasks, including coding, office work, and scientific research endeavors. This places it firmly among the elite open-source models available, and it has been concurrently integrated into multiple Tencent products.