Tencent unveils Hy4 model and plans open weights within days

Tencent said Hy4 is its latest-generation large language model and that it ranks among the leading open-source models. The company's figures focus on applied work. On its WorkBuddy evaluations, Hy4 placed first in nine of twelve scenarios in mainland China, and on GameDev tasks it improved 19.1 percent over its earlier preview.

Tencent also describes Hy4 as a step toward recursive self-improvement, saying the model helped optimize pre-training for smaller models that share its architecture. The release emphasizes front-end and game development, scientific research and enterprise workflows.

For founders, the release adds another strong open-weight option from a Chinese lab, which matters for teams that self-host or fine-tune. Company benchmarks mostly cover Tencent's own product scenarios, so run tests on your own tasks once the weights and system card are published.