Hymotion 1.0

Hymotion 1.0 (also known as HY-Motion 1.0 or Hunyuan Motion 1.0) is Tencent's open-source, billion-parameter text-to-3D motion generation model released in December 2025. Built on a Diffusion Transformer (DiT) architecture with flow matching, it generates high-fidelity, smooth, and diverse 3D character animations from natural language descriptions. Trained on over 3,000 hours of diverse motion data covering 200+ motion categories including locomotion, sports, fitness, social interactions, and daily activities. The model employs a three-stage training paradigm: large-scale pretraining, high-quality fine-tuning with 400 hours of curated text-motion pairs, and reinforcement learning for physical plausibility. Supports standard 3D formats (FBX, BVH, GLTF) for seamless integration with Blender, Unity, and Unreal Engine. Available through web demo, open-source model weights on GitHub and Hugging Face, and API access.