How much does one video cost?

It depends on the settings. The exact price is on the button before you start, and it updates with every change.

What if it doesn't work out?

If the run fails at the provider, no credits are charged. If the result is ready but you don't like it, press “Edit and retry”: the prompt and settings stay.

Which frame shapes are there?

16:9, 9:16, 1:1. 9:16 suits Reels, Shorts and stories; 16:9 suits YouTube and websites.

Can I use my own picture?

Yes: add up to 1 — from your computer, from the Library or as an element. The model takes them as a base or a reference.

Where are the results kept?

Every finished result goes to your Library. From there you can download it, publish it in the Community or use it as the base for the next one.

HeyGen Avatar IV

HeyGen · Video · 720p, 1080p

API

Saved

Example

Your video will appear here

Fill in the settings and press Run. The result is also saved to your library.

Price

Reference price

No published price yet - this model is not in the public price list.

What the price depends on

The provider bills this one by the length of the file you upload. Until it is uploaded we quote the longest they accept, so the estimate can only go down.
Resolution and quality settings change the price. Change one and the number above follows.
A generation the provider fails is not charged. A chat answer is charged for what the model wrote and thought, even if you stop it.

Prices for every model Top up

Prices are in credits. What a credit costs is on the pricing page.

About the model

HeyGen Avatar IV animates one photo into a lip-synced talking head that speaks the audio you supply, at 720p or 1080p.

Produces: Video
Takes: text, sound, pictures
Prompt: optional
Frame shape: 16:9, 9:16, 1:1
Resolution: 720p, 1080p

What you can set

Every setting of this model and the choices it allows — the same as in the form.

Driving audiorequired
one file
Input imagesrequired
one file
Aspect ratio
16:99:161:1
Resolution
720p1080p

For developers

Run this from your own code

The same request the Generate tab sends, with the settings you have chosen.

Model id:heygen-avatar-iv

curl -X POST https://seedara.ai/api/v1/generate \
  -H "Authorization: Bearer $SEEDARA_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "heygen-avatar-iv",
  "prompt": "Describe the shot: subject, action, camera move, lighting...",
  "params": {
    "aspect_ratio": "16:9",
    "resolution": "720p"
  }
}'

This snippet updates as you change the form. Copy it once the settings are the ones you want.

Request parameters

What goes in `params`, by the names the API uses.

Required

The model refuses the request without these.

Parameter	Type	Accepted values	Default
`audio_url` Driving audio	audio	—	—
`image_urls` Input images	images	up to 1 files	—

Optional

Left out unless you set them - the provider then applies its own default.

Parameter	Type	Accepted values	Default
`aspect_ratio` Aspect ratio	one of a list	`16:99:161:1`	16:9
`resolution` Resolution	one of a list	`720p1080p`	720p

How a generation runs

POST /v1/generate answers immediately with a job_id - it does not wait for the result.
Poll GET /v1/jobs/{id} until status is completed or failed.
A completed job carries output_url - the finished file.

curl https://seedara.ai/api/v1/jobs/JOB_ID \
  -H "Authorization: Bearer $SEEDARA_API_KEY"

Questions

Frequently asked about HeyGen Avatar IV

New

Start now

Your first video —
in a minute

Describe what you want to see — the model does the rest.

Takes you to the settings — prompt, format and price are already there

No auto-charges
Pay only for a finished result
Works are kept in your Library

100credits as a gift

16:9 · 9:16 · 1:1Frame shape