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Important
We're upgrading HeyGen API billing
Starting now, the API uses a pay-as-you-go model. Purchase USD when you need it — no monthly subscription, no commitments.
What this means for your current plan:

Pay-As-You-Go (new default): Purchase and use USD balance anytime.

Enterprise plan: No change. Your balance will continue to display and calculate in credits.

Legacy plan (Pro or Scale): Nothing changes unless you choose to switch. Your existing credit balance won't disappear — it converts 1:1 ($1 USD per credit), and any discounts or special rates you have will be preserved for your current cycle.

If you switch from a legacy plan: Your current billing cycle will end, and your account will move to Pay-As-You-Go with no monthly commitment.

API Costs

HeyGen offers two pricing models:

Pay-As-You-Go: You're charged based on the duration of your video, with pricing calculated in dollars.
Enterprise: Credits are allocated to your account based on your contract. The dollar value per credit may vary depending on the terms of your agreement.

Video Agent

Agent type	Pay-As-You-Go Pricing	Enterprise Pricing
Prompt to Video	$0.0333 / sec	0.0666 credit / sec

Video Generation

Avatar type	Engine	Pay-As-You-Go Pricing	Enterprise Pricing
Public Avatar	III	$0.0167 / sec	0.0167 credit / sec
Public Avatar	IV	$0.1 / sec	0.1 credit / sec
Digital Twin	III	$0.0333 / sec	0.0333 credit / sec
Digital Twin	IV	$0.1 / sec	0.1 credit / sec
Photo Avatar	III	$0.0167 / sec	0.0167 credit / sec
Photo Avatar	IV	$0.1 / sec	0.1 credit / sec

Avatar IV is used when use_avatar_iv_model is set to true.

Translate Video

Endpoint / mode	Pay-As-You-Go Pricing	Enterprise Pricing
Speed Mode	$0.05 / sec	0.05 credit / sec
Precision Mode	$0.1 / sec	0.1 credit / sec
Proofread	$0.0083 / sec	0.0083 credit / sec

Proofread is available on Enterprise plans only.

Speech & Audio

Model	Pay-As-You-Go Pricing	Enterprise Pricing
TTS - Starfish	$0.000333 / sec	0.000333 credit / sec

Photo Avatar

Endpoint	Pay-As-You-Go Pricing	Enterprise Pricing
`photo_avatar/photo/generate`	$1 per call	1 credit per call
`photo_avatar/look/generate`	$1 per call	1 credit per call
`photo_avatar/train`	$4 per call	4 credits per call
`photo_avatar/add_motion`	$1 per call	1 credit per call

Check your usage history at: Space Settings → History → API Usage.

Endpoint Limits

Video Generation

HeyGen limits the size and format of resources such as images, audio or video, that can be uploaded to the Video/Generate endpoint. Render errors may occur if resources are invalid.

Resource Type	Supported format	Max File Size	Resolution
Video	MP4	100MB	<2K
Image	JPG, PNG	50MB	<2K
Audio	WAV, MP3	50MB

Please ensure:

Your resource URL is public and accessible to anyone.
The provided asset is in one of the supported formats.
Check that the asset file extension aligns with the actual format.
Verify that the asset file is not corrupted or misformatted.

Digital Twin Input

Avatar input can be either text or audio:

The Input Text - which is the text the Avatar speaks - should be less than 5,000 characters.
The duration of audio input for avatars should not exceed 10 minutes (600 seconds).

Invalid inputs will result in video render failures.

Output Video Specifications

The frame rate of video output containing avatars is 25fps.
dimension parameter width or height must be less than 4096 and greater than 128.
Maximum 50 Video Input/scenes allowed per video.