HY-4

HY-4 is Tencent Hunyuan's coming-soon enterprise model. The listed size is 770B total parameters with about 49B active, a 1M context window, and native text plus image input. No benchmark scores are published for it in this catalog yet. It is not callable. For live 1M-context vision work, use Qwen 3.8 Max or GLM 5.3.