Use Runway through Rivya Public API v1 with model id runway, supported inputs, parameters, Files API rules, credits, and response examples.

Available via APIText or URL ready; reference modes use Files APIVideo

API model id

runway

Inputs

text, file

Files API

Required for reference modes

Base credits

Capability

Video

Billing

FIXED

Prompt limit

1800 characters

Request contract

Send the model id at the top level. Model-specific controls belong in params.

Key	Type	Required	Default	Description
model	string	Yes	runway	Use the runway API model id.
prompt	string	Yes	-	Maximum 1800 characters for this model.
params	object	No	-	Model-specific parameter object. Use the rows below for allowed keys.
client_request_id	string	No	-	Optional client-side id for tracing requests in your system.

Model parameters

Key	Type	Required	Default	Range	Options	Description
duration	select	No	5	-	5, 10	Duration
quality	select	No	720p	-	720p, 1080p	Quality
aspectRatio	select	No	16:9	-	16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio
waterMark	text	No	-	-	-	Watermark

Upload policy

Upload reference files first, then place the returned URL and duration token inside params.referenceMediaItems.

Reference rule

Reference image: Optionally upload one image to switch into image-to-video mode; leave it empty to stay in text mode.

Max files

Accepted file kinds

image

Duration token

Video and audio references should carry durationToken from /api/v1/files when duration verification is required.

kind	Max size	MIME types
image	10 MB	image/jpeg, image/png, image/webp

Minimal request

{
  "model": "runway",
  "prompt": "A cinematic product reveal with smooth camera movement",
  "params": {
    "duration": "5",
    "quality": "720p",
    "aspectRatio": "16:9",
    "waterMark": "Leave empty to disable watermark"
  }
}

Reference-file request

{
  "model": "runway",
  "prompt": "A cinematic product reveal with smooth camera movement",
  "params": {
    "duration": "5",
    "quality": "720p",
    "aspectRatio": "16:9",
    "waterMark": "Leave empty to disable watermark",
    "referenceMediaItems": [
      {
        "url": "https://cdn.example.com/reference-image.png",
        "kind": "image",
        "name": "reference-image.png",
        "mimeType": "image/png"
      }
    ]
  }
}

Create response

The create endpoint returns a public task id. Poll the status endpoint until the task succeeds or fails.

{
  "id": "task_runway_example",
  "status": "queued",
  "model": "runway",
  "reserved_credits": 12,
  "final_credits": 0,
  "created_at": "2026-05-11T00:00:00.000Z",
  "updated_at": "2026-05-11T00:00:00.000Z",
  "result": null,
  "error": null
}

Common errors

validation_failed, insufficient_credits, idempotency_conflict, rate_limited, not_found

Some modes require Files API reference uploads.

Runway API Integration