HappyHorse 1.0

Capabilities at a glance

• #1 on the Artificial Analysis Video Arena — 1381 Elo, 107-pt margin over #2
• Single forward pass generates video and audio together — no bolt-on TTS
• Multilingual lip-sync in 7 languages: English, Mandarin, Cantonese, Japanese, Korean, German, French
• Native 1080p HD output — no upscaling step
• ~10 second typical generation; ~38 seconds for full 1080p on a single H100
• 15B-parameter, 40-layer Transformer architecture with no cross-attention
• Up to 15-second clips on paid tier (12s on lite tier)

Specs

Starting price

$0.15 / generation

Generation time

10–38 seconds

Max resolution

1920×1080 (1080p native)

Inputs → outputs

text, image → video, audio

How to use HappyHorse 1.0

1. 1
   Write a prompt with motion and camera direction

   HappyHorse responds well to camera vocabulary. Example: 'Slow tracking shot of a courier on a bicycle weaving through Shanghai night traffic, neon reflections, ambient city sounds with light rain'.
2. 2
   Optional: add an image input for I2V

   Drop in a reference image to anchor the opening frame. HappyHorse leads the Image-to-Video arena (1401 Elo) — strong subject consistency from a single still.
3. 3
   Pick a language for lip-sync if the clip has dialogue

   Choose from English, Mandarin, Cantonese, Japanese, Korean, German, or French. Lip movement is generated in the same pass as the video — no separate dubbing step.
4. 4
   Generate

   Oakgen runs HappyHorse via fal. A typical 10-second 1080p clip with audio renders in ~10–38 seconds.

API access

curl -X POST https://api.oakgen.ai/v1/generate/video \
  -H "Authorization: Bearer $OAKGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "happyhorse-1-0",
    "prompt": "Slow tracking shot of a courier on a bicycle weaving through Shanghai night traffic, neon reflections, ambient city sounds with light rain",
    "duration": 10,
    "aspect_ratio": "16:9",
    "lip_sync_language": "english"
  }'

const res = await fetch("https://api.oakgen.ai/v1/generate/video", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.OAKGEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "happyhorse-1-0",
    prompt: "Slow tracking shot of a courier on a bicycle weaving through Shanghai night traffic, neon reflections, ambient city sounds with light rain",
    duration: 10,
    aspect_ratio: "16:9",
    lip_sync_language: "english",
  }),
});

const { jobId } = await res.json();
console.log("Job started:", jobId);

Compared to other models

License & commercial use

Commercial use included on all Oakgen paid plans

Yes — included on Pro and above

FAQs