HeyGen
AI avatar video generation with expressive speech and lip sync
HeyGen develops avatar driven video generation models that produce photorealistic digital presenters with synchronized lip movements, natural facial expressions, and multilingual speech. Their models support text to speech with adjustable speed, pitch, and expressiveness across hundreds of voices and languages, as well as prompt based video creation through their Video Agent. As a Runware provider, HeyGen models are available for avatar video and agentic video generation through a single inference pipeline alongside other creators.
Models by HeyGen
HeyGen Video Agent is an AI video production model that generates complete, multi-scene videos from a single text prompt. It automates the full production pipeline — scriptwriting, avatar selection, shot planning, B-roll integration, motion graphics, captions, and editing — producing broadcast-ready videos with consistent branding. The agent supports customizable avatars, voice cloning, and iterative editing without full regeneration, enabling scalable video content creation for marketing, training, and social media.
HeyGen Avatar IV is a photorealistic AI avatar generation model that creates talking videos from a single image and a script or audio input. The model synchronizes voice with facial motion, expressions, and gestures to produce lifelike avatar performances. It supports multilingual speech, realistic lip synchronization, and expressive body language, enabling scalable production of presenter-style videos without cameras, actors, or studio setups.