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Model infoModelsSnapshot: 15 Oct 2026

Decart / Lucy

Lucy Motion

Retired image-to-video model controlled by an object movement trajectory. The historical SDK describes output clips limited to five seconds.

Video generation
retiredClosed weightsVideo generationMotion control
Official documentation (opens in a new tab)Reviewed 15 Oct 2026
6 of 21 specification fields collected
Output resolution720pSee specification notes below
Clip durationUp to 5 secondsSee specification notes below
Input billingNot collectedDecart API (retired)
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

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Maximum input tokens
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Maximum output
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Reasoning
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Tool calling
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Structured output
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Streaming
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Batch processing
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Fine-tuning
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Knowledge cutoff
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Release date
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Parameters
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Architecture
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Languages
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Context caching
Not collected

Not established for this historical hosted model; no successor or unrelated provider capabilities inherited.

Endpoint availability
Native service retired; notice appears in May 2026.Source for Endpoint availability (opens in a new tab)
Input modalities
Image, TrajectorySource for Input modalities (opens in a new tab)
Output modalities
VideoSource for Output modalities (opens in a new tab)
Release window
2025-10Source for Release window (opens in a new tab)

Month-level launch announcement.

Video duration
Up to 5 secondsSource for Video duration (opens in a new tab)

Historical SDK input description, not a currently available service limit.

Output resolutions
720pSource for Output resolutions (opens in a new tab)

Only accepted resolution literal in the historical schema.

Access & pricing

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

Decart API (retired)

Provider source (opens in a new tab)
API model ID
lucy-motion
Access
Retired native service; retained for historical identity and integration context.
Regions
Not established
API endpoint URL
/v1/jobs/lucy-motion; legacy generate path /v1/generate/lucy-motionSource for API endpoint URL (opens in a new tab)
Required request fields
data, trajectorySource for Required request fields (opens in a new tab)
Model controls
data, trajectory, seed, resolutionSource for Model controls (opens in a new tab)
Motion trajectory controls
2–1000 trajectory points. Each contains nonnegative numeric frame,x,y. The schema gives no upper coordinate bound, units or integer-only constraint.Source for Motion trajectory controls (opens in a new tab)
Reference image syntax
Image input supports File,Blob,ReadableStream,URL,URL string or ReactNative file descriptor.Source for Reference image syntax (opens in a new tab)
Seed control
Optional numeric seed; no integer-only constraint or range declared.Source for Seed control (opens in a new tab)
Resolution controls
720p literal with default 720p.Source for Resolution controls (opens in a new tab)
Result metadata
SDK metadata:1280×704 at 25 FPS. Does not establish an output-codec contract.Source for Result metadata (opens in a new tab)
Asynchronous generation
SDK defines queue and legacy generate paths; this does not establish discounted Batch API pricing.Source for Asynchronous generation (opens in a new tab)
Endpoint availability
Provider May 2026 changelog says no longer served.Source for Endpoint availability (opens in a new tab)
Pricing coverage
Not collected

No verified historical tariff. Current Lucy, avatar or lip-sync prices must not be substituted.

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

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

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.

Decart API (retired)

lucy-motion
Not verified

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

How it works
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

Minimum reusable input
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

Lifetime & refresh
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

How to enable it
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

Usage fields
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

Billing rules
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

Limits & data boundaries
Not collected

Historical inference caching and cache billing are not established. Streaming buffers and uploaded reference files are separate mechanisms.

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

Caching reviewed 15 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

Provider SDK names this distinct hosted model and the changelog announces its retirement. No matching weights appear in the reviewed official inventories; closed-weight classification is inferred from that evidence and provider API terms, not from the open SDK license.

Classification evidence (opens in a new tab)

Sources reviewed