CAPI
Models/Runway
Video

Runway

by Runway

Runway Gen-4 and Aleph for text-to-video generation and instruction-based video editing.

Get API KeyRead the docs

Capabilities

  • Text to video
  • Extend video
  • Video editing

Available models

Pass any of these IDs in the model field.

Model IDDetailPrice
runway-gen-4-text-to-video5s · 1080p$0.12 / second
runway-aleph-edit-videoper edit$0.90 / call

Pricing starts at

$0.120 / second

Pay only for what you use. Each response returns the exact amount settled against your balance — no subscriptions, no minimums.

Quickstart

Runway · runway-gen-4-text-to-video

cURL
curl -X POST https://capi.ai/api/v1/kling/text_to_video \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "runway-gen-4-text-to-video",
    "prompt": "A paper kite flying above a quiet coastal town at sunrise",
    "duration_seconds": 5
  }'

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