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DER.run
Open studio
Video model · by AlibabaFree

HappyHorse 1.1

Video from text, a photo, and reference images and clips. Makes 3–15 second clips from text, a photo, or reference images and clips.

  • References
  • Cinematic
  • Image to video
  • Text to video

Price shown in the studio before you generate

Try in studioAPI example
  • No samples yet

Specs

Modes
Text to video · Image to video · References
Duration
3–15 s, any whole second
Resolution
480p · 720p · 1080p
Aspect ratio
16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 4:5 · 5:4 · 9:21 · 21:9
Frames
A start image
Reference files
Up to 9 images
File types
PNG, JPEG, WEBP · up to 20 MB / MP4, WebM · up to 200 MB
Tier
Free — everyone can use it

Price

Pricing

The studio shows the exact price before you generate. Failed runs are refunded.

API

Use HappyHorse 1.1 from code

Model id happyhorse. Same price and limits as the studio.

Full API docsUse with AI agents
REST · POST /v1/jobs
curl -X POST "https://api.der.run/v1/jobs" \
  -H "Authorization: Bearer $DER_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "happyhorse",
    "params": {
      "model_version": "1.1",
      "mode": "t2v",
      "duration": 5,
      "prompt": "…"
    }
  }'

# then poll every 15 s until it’s finished
curl "https://api.der.run/v1/jobs/{id}" \
  -H "Authorization: Bearer $DER_API_KEY"

FAQ

About HappyHorse 1.1

How long can a HappyHorse 1.1 video be?

Any whole number of seconds from 3 to 15. Longer clips cost more — the studio shows the price first.

How long are my videos kept?

7 days. Keep the ones you want in your Library (up to 200) so they don’t expire.
All questions

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Make your next clip

HappyHorse 1.1 · 3–15 s

Try HappyHorse 1.1