Quick Reference

Model	Endpoint	Duration	Audio	Speed
Kling 2.6 Pro	fal-ai/kling-video/v2.6/pro/text-to-video	5-10s	Yes	Slow
Sora 2	fal-ai/sora	5-20s	Optional	Slow
LTX-2 Pro	fal-ai/ltx-2-pro	5s	Yes	Medium
Runway Turbo	fal-ai/runway-gen3/turbo/text-to-video	5-10s	No	Fast
Luma	fal-ai/luma-dream-machine	5s	No	Medium

Aspect Ratio	Value	Use Case
Landscape	"16:9"	Standard video
Portrait	"9:16"	Social/mobile
Square	"1:1"	Social posts

Prompt Structure	Example
Subject + Action	"A woman walks"
+ Setting	"through a forest"
+ Style	"cinematic lighting"
+ Camera	"tracking shot"

When to Use This Skill

Use for text-to-video generation:

• Creating videos from text descriptions
• Choosing models by quality/speed tier
• Crafting motion-oriented prompts
• Generating videos with native audio
• Preview workflow (fast) → Final (quality)

Related skills:

• For image-to-video: see fal-image-to-video
• For video editing: see fal-video-to-video
• For model comparison: see fal-model-guide

---

fal.ai Text-to-Video Models

Complete reference for all text-to-video generation models on fal.ai.

Kling Video Models

Kling 2.0 Standard

Endpoint: fal-ai/kling-video/v2.0/text-to-video
Best For: Good quality, cost-effective

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/kling-video/v2.0/text-to-video", {
  input: {
    prompt: "A majestic eagle soaring over snow-capped mountains at golden hour, cinematic lighting",
    duration: "5",  // "5" or "10" seconds
    aspect_ratio: "16:9",
    negative_prompt: "blurry, distorted, low quality"
  }
});

console.log(result.video.url);

import fal_client

result = fal_client.subscribe(
    "fal-ai/kling-video/v2.0/text-to-video",
    arguments={
        "prompt": "A majestic eagle soaring over mountains",
        "duration": "5",
        "aspect_ratio": "16:9",
        "negative_prompt": "blurry, distorted"
    }
)
print(result["video"]["url"])

Kling 2.5 Pro

Endpoint: fal-ai/kling-video/v2.5/pro/text-to-video
Best For: Professional quality videos

const result = await fal.subscribe("fal-ai/kling-video/v2.5/pro/text-to-video", {
  input: {
    prompt: "A luxury car driving through a mountain road, drone shot, cinematic",
    duration: "5",
    aspect_ratio: "16:9",
    negative_prompt: "shaky, amateur, blurry"
  }
});

Kling 2.6 Pro (Latest)

Endpoint: fal-ai/kling-video/v2.6/pro/text-to-video
Best For: Highest quality with native audio generation

The latest Kling model with built-in audio generation.

const result = await fal.subscribe("fal-ai/kling-video/v2.6/pro/text-to-video", {
  input: {
    prompt: "Ocean waves crashing on rocky cliffs at sunset, seagulls flying, ambient sounds",
    duration: "5",
    aspect_ratio: "16:9",
    negative_prompt: "static, boring, low quality"
  }
});

console.log(result.video.url);
console.log(result.audio?.url);  // Native audio included

Kling Parameters:

Parameter	Type	Values	Description
prompt	string	-	Video description
duration	string	"5", "10"	Duration in seconds
aspect_ratio	string	"16:9", "9:16", "1:1"	Video dimensions
negative_prompt	string	-	What to avoid

Sora 2

Sora (OpenAI)

Endpoint: fal-ai/sora
Best For: Advanced, creative video generation

const result = await fal.subscribe("fal-ai/sora", {
  input: {
    prompt: "A stylish woman walks down a Tokyo street filled with warm glowing neon and animated city signage. She wears a black leather jacket, a long red dress, and black boots. She carries a black purse. She wears sunglasses and red lipstick. She walks confidently. The street is damp and reflective, creating a mirror effect of the colorful lights.",
    duration: 10,
    aspect_ratio: "16:9",
    resolution: "1080p"
  }
});

console.log(result.video.url);

Sora Parameters:

Parameter	Type	Values	Description
prompt	string	-	Detailed video description
duration	number	5-20	Duration in seconds
aspect_ratio	string	"16:9", "9:16", "1:1"	Video dimensions
resolution	string	"720p", "1080p"	Output resolution

LTX Video Models

LTX Video (Original)

Endpoint: fal-ai/ltx-video
Best For: Fast, efficient generation

const result = await fal.subscribe("fal-ai/ltx-video", {
  input: {
    prompt: "A beautiful sunset over the ocean with gentle waves",
    negative_prompt: "low quality, blurry, distorted",
    num_inference_steps: 30,
    guidance_scale: 7.5,
    aspect_ratio: "16:9"
  }
});

LTX Video v2

Endpoint: fal-ai/ltx-video/v2
Best For: Improved quality over v1

const result = await fal.subscribe("fal-ai/ltx-video/v2", {
  input: {
    prompt: "A futuristic city with flying cars and neon lights",
    negative_prompt: "ugly, distorted",
    num_inference_steps: 35,
    guidance_scale: 7.0,
    resolution: "720p"
  }
});

LTX-2 Pro

Endpoint: fal-ai/ltx-2-pro
Best For: High fidelity with audio support

const result = await fal.subscribe("fal-ai/ltx-2-pro", {
  input: {
    prompt: "A jazz band performing in a dimly lit club, smooth music, intimate atmosphere",
    negative_prompt: "worst quality, inconsistent motion, blurry",
    num_inference_steps: 30,
    guidance_scale: 3.5,
    resolution: "720p",
    enable_audio: true  // Generate matching audio
  }
});

console.log(result.video.url);
console.log(result.audio?.url);  // Audio track if enabled

LTX Parameters:

Parameter	Type	Default	Description
prompt	string	-	Video description
negative_prompt	string	-	What to avoid
num_inference_steps	number	30	Quality steps
guidance_scale	number	7.5	Prompt adherence
resolution	string	"720p"	"720p" or "480p"
aspect_ratio	string	"16:9"	Video dimensions
enable_audio	boolean	false	Generate audio (LTX-2 Pro)

Wan Video

Wan v2.1 1.3B

Endpoint: fal-ai/wan/v2.1/1.3b/text-to-video
Best For: Lightweight, fast generation

const result = await fal.subscribe("fal-ai/wan/v2.1/1.3b/text-to-video", {
  input: {
    prompt: "A cat playing with a ball of yarn, cute, playful",
    num_frames: 81,  // Number of frames
    resolution: "480p"
  }
});

Wan v2.1 14B

Endpoint: fal-ai/wan/v2.1/14b/text-to-video
Best For: Higher quality, larger model

const result = await fal.subscribe("fal-ai/wan/v2.1/14b/text-to-video", {
  input: {
    prompt: "A professional chef preparing sushi, precise movements, high-end restaurant",
    num_frames: 81,
    resolution: "720p"
  }
});

MiniMax Video

MiniMax Text-to-Video

Endpoint: fal-ai/minimax-video/text-to-video
Best For: Balanced quality and speed

const result = await fal.subscribe("fal-ai/minimax-video/text-to-video", {
  input: {
    prompt: "A butterfly emerging from a cocoon, macro shot, nature documentary style",
    prompt_optimizer: true  // Enhance prompt automatically
  }
});

MiniMax Parameters:

Parameter	Type	Description
prompt	string	Video description
prompt_optimizer	boolean	Auto-enhance prompt

Runway Gen-3

Runway Gen-3 Turbo

Endpoint: fal-ai/runway-gen3/turbo/text-to-video
Best For: Fast iteration, previews

const result = await fal.subscribe("fal-ai/runway-gen3/turbo/text-to-video", {
  input: {
    prompt: "A dancer performing ballet in an empty theater, spotlight, graceful movements",
    duration: 5,
    ratio: "16:9"
  }
});

Runway Parameters:

Parameter	Type	Values	Description
prompt	string	-	Video description
duration	number	5, 10	Seconds
ratio	string	"16:9", "9:16", "1:1"	Aspect ratio

Luma Dream Machine

Luma Text-to-Video

Endpoint: fal-ai/luma-dream-machine
Best For: Creative, artistic videos

const result = await fal.subscribe("fal-ai/luma-dream-machine", {
  input: {
    prompt: "A magical forest with glowing mushrooms and fireflies at night",
    aspect_ratio: "16:9",
    loop: false
  }
});

Luma Parameters:

Parameter	Type	Description
prompt	string	Video description
aspect_ratio	string	"16:9", "9:16", "1:1"
loop	boolean	Create looping video

CogVideoX

CogVideoX Text-to-Video

Endpoint: fal-ai/cogvideox
Best For: Open-source alternative

const result = await fal.subscribe("fal-ai/cogvideox", {
  input: {
    prompt: "A timelapse of a flower blooming, from bud to full bloom",
    num_inference_steps: 50,
    guidance_scale: 6.0
  }
});

CogVideoX-5B

Endpoint: fal-ai/cogvideox-5b
Best For: Higher quality open-source

const result = await fal.subscribe("fal-ai/cogvideox-5b", {
  input: {
    prompt: "An astronaut floating in space with Earth in the background",
    num_inference_steps: 50,
    guidance_scale: 6.0,
    num_frames: 49
  }
});

HunyuanVideo

Hunyuan Video

Endpoint: fal-ai/hunyuan-video
Best For: Chinese model, good quality

const result = await fal.subscribe("fal-ai/hunyuan-video", {
  input: {
    prompt: "A traditional Chinese dragon dance during festival celebration",
    num_inference_steps: 50,
    guidance_scale: 6.0
  }
});

Model Comparison

Quality Rankings

Tier	Models	Quality	Speed	Cost
Premium	Kling 2.6 Pro, Sora 2	Highest	Slow	$$$
Professional	Kling 2.5 Pro, LTX-2 Pro	High	Medium	$$
Standard	Kling 2.0, Runway Turbo	Good	Fast	$
Budget	LTX v1, CogVideoX	Acceptable	Fast	$

Feature Comparison

Model	Audio	Duration	Resolution	Best Use
Kling 2.6 Pro	Native	5-10s	1080p	Cinematic
Sora 2	Optional	5-20s	1080p	Creative
LTX-2 Pro	Yes	5s	720p	Fast HQ
Runway Turbo	No	5-10s	720p	Iteration
MiniMax	No	6s	720p	Balanced
Luma	No	5s	720p	Artistic

Speed Comparison (approximate)

Model	~Generation Time (5s video)
Runway Gen-3 Turbo	30-60s
LTX Video	45-90s
MiniMax	60-120s
Kling 2.5 Pro	120-180s
Kling 2.6 Pro	150-240s
Sora 2	180-300s

Prompt Engineering for Video

Structure Your Prompts

[Subject] + [Action] + [Setting] + [Style] + [Camera/Technical]

Examples:

// Good: Specific, action-oriented
"A golden retriever running through autumn leaves in a forest, slow motion, cinematic, warm lighting, tracking shot"

// Bad: Vague, static
"A dog in a forest"

Motion Keywords

Keyword	Effect
"walking", "running", "jumping"	Subject movement
"slow motion", "timelapse"	Speed modification
"tracking shot", "pan", "zoom"	Camera movement
"floating", "flying", "falling"	Spatial movement
"dancing", "spinning", "waving"	Rhythmic movement

Style Keywords

Keyword	Effect
"cinematic"	Movie-like quality
"documentary"	Realistic style
"anime"	Animated style
"noir"	Dark, contrasty
"vibrant"	Saturated colors

Camera Movements

Term	Description
"tracking shot"	Camera follows subject
"pan left/right"	Horizontal camera sweep
"tilt up/down"	Vertical camera sweep
"zoom in/out"	Focal length change
"drone shot"	Aerial perspective
"POV shot"	First-person view
"dolly shot"	Camera moves on track

Complete Parameter Reference

interface TextToVideoInput {
  // Required
  prompt: string;

  // Duration (varies by model)
  duration?: number | string;  // seconds

  // Dimensions
  aspect_ratio?: "16:9" | "9:16" | "1:1" | "4:3" | "21:9";
  resolution?: "480p" | "720p" | "1080p";

  // Quality control
  negative_prompt?: string;
  num_inference_steps?: number;
  guidance_scale?: number;

  // Reproducibility
  seed?: number;

  // Model-specific
  prompt_optimizer?: boolean;  // MiniMax
  enable_audio?: boolean;      // LTX-2 Pro, Kling 2.6
  loop?: boolean;              // Luma
  num_frames?: number;         // Wan, CogVideoX
}

Workflow Examples

Production Workflow

// 1. Fast preview with Runway Turbo
const preview = await fal.subscribe("fal-ai/runway-gen3/turbo/text-to-video", {
  input: {
    prompt: "A woman walking through a rainy city street at night",
    duration: 5,
    ratio: "16:9"
  }
});

console.log("Preview:", preview.video.url);
// Review and refine prompt...

// 2. Final render with Kling Pro
const final = await fal.subscribe("fal-ai/kling-video/v2.6/pro/text-to-video", {
  input: {
    prompt: "A stylish woman walking confidently through a rainy Tokyo street at night, neon reflections on wet pavement, cinematic lighting, slow motion, tracking shot",
    duration: "10",
    aspect_ratio: "16:9"
  }
});

console.log("Final:", final.video.url);

Batch Generation

const prompts = [
  "A sunrise over mountains",
  "A sunset over the ocean",
  "A storm rolling in"
];

const videos = await Promise.all(
  prompts.map(prompt =>
    fal.subscribe("fal-ai/ltx-video", {
      input: { prompt, aspect_ratio: "16:9" }
    })
  )
);

videos.forEach((v, i) => console.log(`Video ${i + 1}: ${v.video.url}`));

Best Practices

1. Use subscribe() not run() - Video generation takes time
2. Start with previews - Use faster models to iterate on prompts
3. Be specific about motion - Describe what moves and how
4. Include camera direction - Guide the visual perspective
5. Use negative prompts - Avoid common artifacts
6. Match model to need - Don't use premium for tests
7. Include audio keywords - For models that support audio generation