2K
text, image, audio
video
Not listed
About this model
LTX-2.3 Fast is a speed-optimized variant of Lightricks' LTX-2.3 video generation model. It is designed for high-speed, cost-effective generation of synchronized audio and video in a single pass. It supports up to 20-second clips, native 9:16 portrait and 16:9 aspect ratios, and resolutions up to 4K. Delivering significantly faster inference than the Pro version, it is ideal for rapid prototyping, batch generation, and short-form social media content.
Input modalities
text
Accepted as model input
image
Accepted as model input
audio
Accepted as model input
Providers
Available routing options for this model through OneInfer.
Video generation
$0.0300 / second
Video generation
$0.0600 / second
Routing
OneInfer optimized
Pricing
Current OneInfer pricing for this model.
| Usage | Price |
|---|---|
| Video generation1280x720 · 720p · 6–20s · 16:9 | $0.0300 / second |
| Video generation720x1280 · 720p · 6–20s · 9:16 | $0.0300 / second |
| Video generation1920x1080 · 1080p · 6–20s · 16:9 | $0.0600 / second |
| Video generation1080x1920 · 1080p · 6–20s · 9:16 | $0.0600 / second |
| Video generation2560x1440 · 1440p · 6–10s · 16:9 | $0.1200 / second |
| Video generation1440x2560 · 1440p · 6–10s · 9:16 | $0.1200 / second |
| Video generation3840x2160 · 4k · 6–10s · 16:9 | $0.2400 / second |
| Video generation2160x3840 · 4k · 6–10s · 9:16 | $0.2400 / second |
Performance
Published evaluation results associated with this model.
API example
curl -X POST https://api.oneinfer.ai/v1/ula/generate-video \
-H "Authorization: Bearer YOUR_JWT_TOKEN" \
-H "Content-Type: application/json" \
-d '{
"provider": "lightricks",
"model": "Lightricks/LTX-2.3-Fast",
"prompt": "A red fox running through a snowy forest",
"resolution": "1280x720",
"aspect_ratio": "16:9",
"duration": 5,
"generate_audio": false,
"camera_fixed": false,
"service_tier": "default"
}'