What it's the best tool for
- Avatar from a single photo
- Natural hand gestures
- Micro-expressions and blinks
- Handles tilts and profiles
- 1280p+ HD output
When to reach for something else
- Always requires Premium Credits
- Long scripts need chunking
- Camera motion is limited
- Source photo quality matters
Four scenarios where it pays for itself
More about HeyGen Avatar IV
HeyGen Avatar IV — Talking Avatars from One Photo
HeyGen Avatar IV turns a single image into a fully animated video with voice sync, expressions and real hand gestures. Released April 2025. Hosted on NetRoom.
What's new
Auto-detection of tilted heads, profiles and angled poses. Micro-expressions, natural blinks, timing tied to punctuation. Output at 1280p+ HD.
Who it is for
Courses and schools, YouTubers, corporate learning, SaaS onboarding — any case where you need a series of talking-head videos without a shoot day.
Use HeyGen Avatar IV via the API
The same engine, straight from your code: one key and one balance for text, images, video and sound. Pay only for the requests you make.
curl https://netroom.ai/api/v1/generations \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "heygen/heygen-avatar-iv", "input": {"prompt": "A cinematic mountain sunrise"}}'The model id is already in the example. The full parameter reference and prices live in GET /api/v1/models and in the docs.
Try HeyGen Avatar IV
right now
Free access to basic models. No card, no obligations.