Runway Gen-4.5

RunwayVideorunway/runway-gen-4.5

Runway Gen-4.5 is a video model by Runway. Jobs run asynchronously: poll for the result or receive a webhook when it finishes.

Text to videoFirst frame

Pricing

This model is not priced yet and cannot be called.

Parameters

Parameter	Allowed values	Default
resolution Resolution	720p	-
aspect_ratio Aspect ratio	16:9 · 9:16	9:16
duration Duration (seconds)	2 – 10	-

Video generation is asynchronous: the request returns 202 with a job ID. Poll it by ID, or set up a webhook to be notified when it finishes. Read the guide →

curl https://api.geekidea.ai/v1/videos/generations \
  -H "Authorization: Bearer $GEEKIDEA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "runway/runway-gen-4.5",
  "prompt": "A paper boat drifting on a rainy street, cinematic lighting",
  "duration": 2,
  "resolution": "720p",
  "aspect_ratio": "9:16"
}'

# 202 Accepted → { "id": "video_…", "status": "queued" }
curl https://api.geekidea.ai/v1/generations/video_… \
  -H "Authorization: Bearer $GEEKIDEA_API_KEY"