Heygen Avatar4
2 modes on this page
Heygen Avatar4 turns a text prompt into a video clip. Pick a mode, write the prompt, run it in the studio.
Input
FormMode
Prompt
Image Url*
Aspect Ratio
Resolution
Result
PreviewMotion preview, not Heygen Avatar4 output
$0.1 per image·~90s
What Heygen Avatar4 is for
Heygen Avatar4 turns a written prompt into a short video clip. Runtime is about 90 seconds and compute is $0.1 per image. Modes on this page: Heygen and Heygen. It is a clip generator, not a full training-video editor.
Heygen Avatar4 is billed in Knowlify credits at the compute cost ($0.1 per image). A typical run is about 90 seconds. Published rate: Your request will cost $0.1 per output video second.
Pick Heygen Avatar4 for text to video at $0.1 per image and ~90s. Compare it with Ai Avatar, Argil Avatar on the related cards below if you need a different look, speed, or input type.
How to use Heygen Avatar4
- 1. Upload the still Heygen Avatar4 should start from, then write the change or motion in Input.
- 2. Run it. The prompt and file hand off to the Knowlify studio, where Heygen Avatar4 generates.
- 3. Stay in the studio if you want that frame or clip inside a longer narrated video.
What you need
- A prompt that names the subject, camera move, and lighting.
- A source still (PNG or JPG) for the model to start from.
- Aspect Ratio (16:9, 9:16, 4:5, 5:4, and more).
- Resolution (360p, 480p, 540p, 720p, and more).
- Optional toggles on this model, such as audio or quality flags.
Example prompt
a steel kitchen at service, flames, a chef in motion, painterly concept art, volumetric light, no text, no watermark, no UI, slow cinematic camera move, natural motion
Frequently asked questions
How do I run Heygen Avatar4?
Run Heygen Avatar4 on Knowlify at /generate/heygen-avatar4. This page has 2 modes in one dropdown. Write the prompt on this page and it opens in the studio, where Heygen Avatar4 generates a short clip. The same studio also turns documents into full narrated videos.
Where can I use Heygen Avatar4 online?
On Knowlify (knowlify.com/generate/heygen-avatar4). You do not need a separate playground. Heygen Avatar4 runs in the studio next to document-to-video.
Can I make a longer video with Heygen Avatar4?
Heygen Avatar4 itself produces a short clip. On Knowlify you can take that output, or skip it and upload a document, and generate a full narrated video with a script you can edit.
What do I need to run Heygen Avatar4?
A prompt and a source still. Heygen Avatar4 will not invent the starting frame for you on this mode.
How long does Heygen Avatar4 take?
Plan on about 90 seconds for a typical run, then whatever queue time the studio has. Video models sit at the high end of that range.
Does Heygen Avatar4 have more than one mode?
Yes. This page has 2 modes: Heygen and Heygen. Switch them in the Mode dropdown instead of opening a new URL.
What does Heygen cost?
Your request will cost $0.1 per output video second. Knowlify charges this as credits, at the compute cost.
What is Heygen best for?
Heygen Avatar 4 Digital Twin Model. It turns a text prompt into a video clip.
Do I need an account to use Heygen?
You need a Knowlify account to run Heygen, and signing up is free. Your prompt carries across.