Tencent unveils hunyuan Hy4, claiming entry into top open-source models with new capabilities

Tencent released the official version of its large language model, Hunyuan Hy4, on November 4, 2026. The company stated that Hy4 has entered the ranks of the strongest open-source models due to significant advancements in its capabilities. The model is set to have its weights released soon, alongside a model system card, with a focus on responsible open-sourcing, particularly concerning network and biological security risks. Hy4 introduces several major upgrades over the Hy4 preview, notably incorporating visual capabilities, substantially expanding pre-training and post-training scales, and boosting comprehensive skills like instruction following and long-context understanding. It can now handle fine-grained image processing and complex chart analysis by integrating perception, reasoning, and tool calling, and it also supports computer operation by combining command-line and graphical interface usage. Currently available on Tencent Cloud and OpenRouter, Hy4 can be experienced within products like CodeBuddy/WorkBuddy, Yuanbao, and ima, maintaining the same API pricing as the preview version. While acknowledging a gap remains compared to leading closed-source models in areas like advanced mathematics and long-range development, Tencent stated it will continue to steadily expand training scales to narrow this difference. Furthermore, a Hy4 flash version is planned for a near-future release to improve cost-effectiveness and inference speed.