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Model infoModelsSnapshot: 15 Oct 2026

HeyGen / HeyGen Image

HeyGen Image 1

Identity-preserving portrait model combining identity photos with a single appearance reference.

Image generation
availableClosed weightsImage generationImage editing
Official documentation (opens in a new tab)Reviewed 14 Oct 2026
6 of 20 specification fields collected
Output resolution9 optionsSee specification notes below
Reference images1–5 identity images of the same person and exactly one appearance referenceSee specification notes below
Input billingNot collectedHeyGen
Output billingNot collectedNo inferred price

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Maximum output
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Context caching
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Reasoning
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Tool calling
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Structured output
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Streaming
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Batch processing
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Fine-tuning
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Parameters
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Architecture
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Knowledge cutoff
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Languages
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Release date
Not collected

No exact model-specific contract established; missing information does not mean unsupported.

Input modalities
ImageSource for Input modalities (opens in a new tab)
Output modalities
ImageSource for Output modalities (opens in a new tab)
Reference images
1–5 identity images of the same person and exactly one appearance referenceSource for Reference images (opens in a new tab)
Output formats
PNGSource for Output formats (opens in a new tab)
Output resolutions
1:1 2176×2176, 2:3 2176×3264, 3:2 3264×2176, 3:4 2160×2880, 4:3 2880×2160, 4:5 2176×2720, 5:4 2720×2176, 9:16 2160×3840, 16:9 3840×2160Source for Output resolutions (opens in a new tab)
Generation controls
identity_remix only; 1–5 outputs, optional seed and aspect ratio. No text prompt or custom dimensions.Source for Generation controls (opens in a new tab)

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

HeyGen

Provider source (opens in a new tab)
API model ID
heygen-image-1
Access
POST https://api.heygen.com/v3/models/images; poll by generation_id. Paid keys; trial keys unsupported.
Regions
No model-specific processing or storage region guarantee established.
nativeOutput
Native canvas from 4K training policy, then narrow center crop; no output upscaling. Inferred reference ratio must be within 1:4 to 4:1 after EXIF orientation.Source for nativeOutput (opens in a new tab)
assetLimits
HTTPS image download up to 16 MiB without redirects; inline decoded images up to 5 MiB.Source for assetLimits (opens in a new tab)
delivery
Poll generation_id; no callbacks or partial results. Default 30 creation and 300 retrieval requests/minute, workspace overrides possible.Source for delivery (opens in a new tab)
Random seed
First output seed 0–4294967295; subsequent outputs increment it. Seeds do not guarantee identical results across model updates.Source for Random seed (opens in a new tab)

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Privacy policy distinguishes customer-directed processing from HeyGen controller purposes. Applicable plan terms, DPA and Enterprise agreements govern training use. No blanket zero-retention or no-training promise inferred. Deleted information can remain in disaster-recovery backups for 60 days.

Read the service policy (opens in a new tab)

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

HeyGen

heygen-image-1
Not verified

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

How it works
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

Minimum reusable input
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

How to enable it
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

Usage fields
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

Billing rules
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract established. Idempotency and saved avatar/voice assets are separate.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 14 Oct 2026

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Official documentation identifies this HeyGen model or proprietary engine, exposed through hosted API or Studio access. Service terms restrict distribution of proprietary technology; no model-weight distribution is established.

Classification evidence (opens in a new tab)

Sources reviewed