Runway API v1 updates:

  • New POST gen4_5/create endpoint for Gen-4.5 text-to-video generation
  • Text-to-video only (no image input required)
  • Duration options: 5 (default), 8, 10 seconds
  • Fixed 720p 16:9 resolution (1280x720)
  • Supports exploreMode for Unlimited plan users
curl -X POST "https://api.useapi.net/v1/runwayml/gen4_5/create" \
  -H "Authorization: Bearer user:12345-…" \
  -H "Content-Type: application/json" \
  -d '{
    "text_prompt": "A dramatic film-noir-style scene of a pretty lady dressed in a Christmas costume. The tones are deep and high-contrast, with rich shadows and bright highlights that create a stark, cinematic tension. The lighting is directional and theatrical, evocative of classic 1940s noir photography — exaggerated grainy texture, dramatic silhouettes, and a sense of narrative suspense.",
    "seconds": 5
  }'