Pre-training and Post-training

Tencent unveiled Hunyuan Hy4, scaling its flagship LLM from under 300B to 770B parameters while adding vision understanding and Computer Use for the first time, with focused gains in instruction following, long-context comprehension and long-horizon agent tasks. Weights are slated for open release, pricing stays at RMB 6 per million input tokens and RMB 18 per million output tokens, and the model is already live across Tencent Cloud, Yuanbao, CodeBuddy and third-party platforms like OpenRouter.