Video

LTX-2.3 I2V Fast

Credit-based pricing. Supports image-to-video, audio generation.

Try LTX-2.3 I2V Fast →Compare models

Output

video

Aspect ratio

auto, 16:9, 9:16

Resolution

1080p, 1440p, 2160p

Duration

6s, 8s, 10s, 12s, 14s, 16s, 18s, 20s

Inputs

Start image (required)

Generates audio

Example prompt

Vibrant tropical coral reef teeming with colorful fish, crystal-clear turquoise water, sunbeams filtering down, fish darting and swaying with the gentle current

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=fal-ai/ltx-2.3/image-to-video/fast.

POST/api/v1/generate14 fields · 3 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Required	Optional model input.
`fps`	number	Optional	The frames per second of the generated video · Allowed: 24, 25, 48, 50 · Default: 25
`generate_audio`	boolean	Optional	Whether to generate audio for the generated video · Default: true
`aspect_ratio`	string	Optional	Allowed: auto, 16:9, 9:16
`resolution`	string	Optional	Allowed: 1080p, 1440p, 2160p
`duration`	number	Optional	Allowed: 6, 8, 10, 12, 14, 16, 18, 20
`image_url`	string	Required	Format: uri
`end_image_url`	string	Optional	Format: uri

Minimal request example

{
  "model_id": "fal-ai/ltx-2.3/image-to-video/fast",
  "prompt": "Vibrant tropical coral reef teeming with colorful fish, crystal-clear turquoise water, sunbeams filtering down, fish darting and swaying with the gentle current",
  "image_url": "https://example.com/image"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=fal-ai%2Fltx-2.3%2Fimage-to-video%2Ffast",
  "title": "LTX-2.3 I2V Fast generation request",
  "description": "Request body accepted by POST /api/v1/generate for fal-ai/ltx-2.3/image-to-video/fast.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "fal-ai/ltx-2.3/image-to-video/fast",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string"
    },
    "fps": {
      "title": "Fps",
      "description": "The frames per second of the generated video",
      "default": 25,
      "type": "number",
      "enum": [
        24,
        25,
        48,
        50
      ]
    },
    "generate_audio": {
      "title": "Generate Audio",
      "description": "Whether to generate audio for the generated video",
      "default": true,
      "type": "boolean"
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "auto",
        "16:9",
        "9:16"
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "1080p",
        "1440p",
        "2160p"
      ]
    },
    "duration": {
      "type": "number",
      "enum": [
        6,
        8,
        10,
        12,
        14,
        16,
        18,
        20
      ]
    },
    "image_url": {
      "type": "string",
      "format": "uri"
    },
    "end_image_url": {
      "type": "string",
      "format": "uri"
    }
  },
  "required": [
    "model_id",
    "prompt",
    "image_url"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does LTX-2.3 I2V Fast cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if LTX-2.3 I2V Fast fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call LTX-2.3 I2V Fast from the API?

Yes. Use POST /api/v1/generate with model_id: "fal-ai/ltx-2.3/image-to-video/fast". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

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No commitment. New accounts get 50 free credits on signup. See pricing.