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Model infoModelsSnapshot: 15 Oct 2026

Synthesia / Synthesia avatar models

Express-2

Full-body avatar generation combining speech-driven motion, motion selection and diffusion-based rendering.

availableClosed weightsVideo generation
Official documentation (opens in a new tab)Reviewed 14 Oct 2026
7 of 20 specification fields collected
Output resolution1080pSee specification notes below
Clip durationNot collectedAwaiting source review
Input billingNot collectedSynthesia
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 model-specific public value established in the reviewed sources.

Maximum output
Not collected

No model-specific public value established in the reviewed sources.

Context caching
Not collected

No model-specific public value established in the reviewed sources.

Reasoning
Not collected

No model-specific public value established in the reviewed sources.

Tool calling
Not collected

No model-specific public value established in the reviewed sources.

Structured output
Not collected

No model-specific public value established in the reviewed sources.

Streaming
Not collected

No model-specific public value established in the reviewed sources.

Batch processing
Not collected

No model-specific public value established in the reviewed sources.

Fine-tuning
Not collected

No model-specific public value established in the reviewed sources.

Parameters
Not collected

No model-specific public value established in the reviewed sources.

Architecture
Composite visual system: Express-Animate, Express-Eval and Express-RenderSource for Architecture (opens in a new tab)
Knowledge cutoff
Not collected

No model-specific public value established in the reviewed sources.

Languages
Not collected

No model-specific public value established in the reviewed sources.

Release date
Not collected

No model-specific public value established in the reviewed sources.

Input modalities
AudioSource for Input modalities (opens in a new tab)

The visual model is driven by speech. Text-to-speech, script drafting and voice choice are separate pipeline stages; this does not establish native language reasoning.

Output resolutions
1080pSource for Output resolutions (opens in a new tab)

Research capability, not a guarantee for every API or product surface.

Output frame rate
30Source for Output frame rate (opens in a new tab)

Published research output rate in frames per second.

Research output capabilities
Research demonstrates long-duration generation without a fixed model duration ceiling. Account quotas and product request limits still apply.Source for Research output capabilities (opens in a new tab)
Generation controls
Seed, motion diversity, intensity and multiple camera framings are demonstrated in research. Public API exposure is not established.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.

API model ID
Not collected

Avatar IDs, voice IDs and component labels are not public immutable model checkpoint selectors.

Access
Hosted Synthesia video creation. Select an eligible avatar in the account; available identities and features depend on plan and rollout. No public immutable checkpoint selector.
Regions
AWS public-cloud hosting; no model-specific regional processing guarantee established.
Billing scope
Video creation consumes credits for new avatar footage. Provider estimates about 100 credits for a typical finished minute, varying with avatar screen time and generated assets. This is not a fixed model-specific per-minute tariff.Source for Billing scope (opens in a new tab)
regeneration
Editing and previewing do not consume generation credits. Only newly generated footage is charged on regeneration; this is not a token-cache contract.Source for regeneration (opens in a new tab)
legacyVideoApi
Not supportedSource for legacyVideoApi (opens in a new tab)

Express-2 is excluded from the legacy video-from-template API. This is not a statement about every interactive product.

background
Express-2 stock avatars use fixed backgrounds; current stock guide does not support background removal.Source for background (opens in a new tab)

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

Data & enterprise terms

Hosted on AWS. Customer data deletion is described as taking up to 90 days, with residual backups subject to their lifecycle. Service-improvement terms permit usage analysis within specified customer-instruction and consent restrictions; this is not a universal no-training or zero-retention promise.

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.

Synthesia

Not verified

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

How it works
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

Minimum reusable input
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

Lifetime & refresh
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

How to enable it
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

Usage fields
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

Billing rules
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

Limits & data boundaries
Not collected

Saved avatars, reusable videos and enrollment reuse are not documented prompt caching or discounted input-token billing.

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

Synthesia identifies this named model in its proprietary research or product materials. No public model weights or permissive weight license are established; open client code does not expose the serving model.

Classification evidence (opens in a new tab)

Sources reviewed