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Video Image to Video Kie.ai

HappyHorse 1.1 Reference-to-Video

HappyHorse 1.1 Reference-to-Video costs $0.0000/clip on FairStack — a image to video model for Character-consistent scenes, Product videos from stills, Multi-shot storytelling. No subscription required. Pay per generation with full REST API access. FairStack applies a transparent 20% margin on infrastructure cost so you always see the real price.

FairStack price
$0.0000/clip

What is HappyHorse 1.1 Reference-to-Video?

HappyHorse 1.1's reference-to-video mode composes a new 3-15 second scene guided by 1-9 reference images — characters, products, or styles — with native audio, Foley, and multilingual lip-sync. Supports nine aspect ratios at 720p or 1080p. Served from Kie.ai at $0.1125/s (720p) or $0.145/s (1080p) with an automatic fal.ai fallback.

Key Features

1-9 reference images
Native audio + Foley
Multilingual lip-sync
Nine aspect ratios at 720p/1080p

What are HappyHorse 1.1 Reference-to-Video's strengths?

Multi-reference consistency
Cheaper than HappyHorse 1.0
Rich native audio

What are HappyHorse 1.1 Reference-to-Video's limitations?

References must be ≥400px short side, ≤10MB
No 4K tier

What is HappyHorse 1.1 Reference-to-Video best for?

Character-consistent scenes Product videos from stills Multi-shot storytelling

How much does HappyHorse 1.1 Reference-to-Video cost?

Metric
FairStack
Details
Price per generation
$0.0000
Includes 20% margin
Subscription
None
Pay per generation only

How does HappyHorse 1.1 Reference-to-Video perform across capabilities?

HappyHorse 1.1 — Kie.ai primary ($0.1125/s 720p), fal.ai fallback — r2v

motion quality
89%
visual quality
90%
prompt adherence
86%
temporal coherence
88%
audio quality
90%
reference fidelity
87%

How do I use the HappyHorse 1.1 Reference-to-Video API?

curl
curl -X POST https://api.fairstack.ai/v1/generations/video \
  -H "Authorization: Bearer $FAIRSTACK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "happyhorse-1-1-r2v",
    "prompt": "Your prompt here"
  }'
Python
import requests

response = requests.post(
    "https://api.fairstack.ai/v1/generations/video",
    headers={
        "Authorization": f"Bearer {FAIRSTACK_API_KEY}",
        "Content-Type": "application/json",
    },
    json={
        "model": "happyhorse-1-1-r2v",
        "prompt": "Your prompt here",
    },
)

result = response.json()
print(result["url"])
Node.js
const response = await fetch(
  "https://api.fairstack.ai/v1/generations/video",
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      model: "happyhorse-1-1-r2v",
      prompt: "Your prompt here",
    }),
  }
);

const result = await response.json();
console.log(result.url);

What parameters does HappyHorse 1.1 Reference-to-Video support?

Parameter
Type
Default
Details
duration
integer
5
Range: 3–15
resolution
enum
1080p
Options: 720p, 1080p
aspect_ratio
enum (optional)
16:9
Options: 16:9, 9:16, 1:1, 4:3, 3:4, 4:5...

Frequently Asked Questions

How much does HappyHorse 1.1 Reference-to-Video cost?

HappyHorse 1.1 Reference-to-Video costs $0.0000/clip on FairStack as of 2026-07-25. This price includes FairStack's transparent 20% margin on infrastructure cost. No subscription or monthly fee — you pay per generation only. Minimum deposit is $1.

What is HappyHorse 1.1 Reference-to-Video and what is it best for?

HappyHorse 1.1's reference-to-video mode composes a new 3-15 second scene guided by 1-9 reference images — characters, products, or styles — with native audio, Foley, and multilingual lip-sync. Supports nine aspect ratios at 720p or 1080p. Served from Kie.ai at $0.1125/s (720p) or $0.145/s (1080p) with an automatic fal.ai fallback. HappyHorse 1.1 Reference-to-Video is best for Character-consistent scenes, Product videos from stills, Multi-shot storytelling. Available via FairStack's REST API with curl, Python, and Node.js SDKs.

Does HappyHorse 1.1 Reference-to-Video have an API?

Yes. HappyHorse 1.1 Reference-to-Video is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/video with your API key and prompt. Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.

How does HappyHorse 1.1 Reference-to-Video compare to other video models?

HappyHorse 1.1 Reference-to-Video excels at Character-consistent scenes, Product videos from stills, Multi-shot storytelling. It is a image to video model priced at $0.0000/clip on FairStack. Key strengths: Multi-reference consistency, Cheaper than HappyHorse 1.0. Compare all video models at fairstack.ai/models.

Start using HappyHorse 1.1 Reference-to-Video today

$0.0000/clip. Full API access. No subscription.

Start Creating