---
name: fal-ai/kling-video/v2.5-turbo/pro/image-to-video
display_name: Kling 2.5 Turbo Pro (Image to Video)
category: image-to-video
creator: Kuaishou (Kling AI)
fal_docs: https://fal.ai/models/fal-ai/kling-video/v2.5-turbo/pro/image-to-video
original_source: https://klingai.com/
summary: High-performance image-to-video model delivering 1080p cinematic results with fluid motion and precise start-to-end frame control.
---

# Kling 2.5 Turbo Pro (Image to Video)

## Overview
- **Slug:** `fal-ai/kling-video/v2.5-turbo/pro/image-to-video`
- **Category:** Image-to-Video
- **Creator:** [Kuaishou Technology (Kling AI)](https://klingai.com/)
- **Best for:** Cinematic, high-fluidity video generation from static images with precise control over the end frame.
- **FAL docs:** [fal.ai/models/fal-ai/kling-video/v2.5-turbo/pro/image-to-video](https://fal.ai/models/fal-ai/kling-video/v2.5-turbo/pro/image-to-video)
- **Original source:** [klingai.com](https://klingai.com/)

## What it does
Kling 2.5 Turbo Pro is a top-tier generative video model designed to transform still images into high-fidelity, cinematic videos. It is specifically optimized for motion fluidity, physical accuracy, and prompt adherence. Unlike standard models, the "Turbo" variant focuses on faster inference speeds without sacrificing the complex temporal logic required for realistic character movements and environmental physics. It excels at maintaining character consistency and style from the source image, offering a professional-grade solution for marketing, social media content, and narrative filmmaking.

## When to use this model
- **Use when:** You need high-quality 1080p video (30fps) with smooth, realistic motion; when you have a specific starting and ending frame (interpolation); or when you require fast turnaround for iterations.
- **Don't use when:** You need videos longer than 10 seconds (use Kling 3.0 for up to 15s) or if you require advanced multilingual lip-sync for speech (v2.5 Turbo is better for environmental audio and sound effects).
- **Alternatives:**
    - **[Kling 3.0 Pro](https://fal.ai/models/fal-ai/kling-video/o3/standard/image-to-video):** Newer generation with better character consistency, native audio, and 15s support.
    - **[Luma Dream Machine](https://fal.ai/models/fal-ai/luma-dream-machine):** Strong competitor for cinematic realism but may have different motion biases.
    - **[Runway Gen-3 Alpha Turbo](https://fal.ai/models/fal-ai/runway-gen3-alpha-turbo):** Excellent for fast, high-quality cinematic shorts but handles aspect ratios differently.

## API — via FAL.ai
**Endpoint:**
- `https://fal.run/fal-ai/kling-video/v2.5-turbo/pro/image-to-video` (Synchronous)
- `https://queue.fal.run/fal-ai/kling-video/v2.5-turbo/pro/image-to-video` (Queue-based)

### Input parameters
| Parameter | Type | Default | Range/Values | Description |
|---|---|---|---|---|
| `prompt` | `string` | **Required** | N/A | Text description of the motion, lighting, and events to occur in the video. |
| `image_url` | `string` | **Required** | URL | The starting frame of the video. Supports JPG, PNG, WebP, GIF, etc. |
| `duration` | `enum` | `5` | `5`, `10` | The length of the generated video in seconds. |
| `negative_prompt` | `string` | `""` | N/A | Elements to exclude (e.g., "blur, distortion, low quality"). |
| `cfg_scale` | `float` | `0.5` | `0.0` - `1.0` | Classifier-Free Guidance scale. Higher values make the model stick closer to the prompt. |
| `tail_image_url` | `string` | `null` | URL | The ending frame of the video. Use this for "Start to End" frame interpolation. |

### Output
The API returns a JSON object containing the generated video metadata.
```json
{
  "video": {
    "url": "https://v3.fal.media/files/...",
    "content_type": "video/mp4",
    "file_name": "...",
    "file_size": 1234567
  }
}
```

### Example request
```json
{
  "prompt": "A cinematic tracking shot of a car speeding through a futuristic neon-lit city at night, rain splashing on the pavement.",
  "image_url": "https://example.com/start_frame.jpg",
  "duration": 5,
  "cfg_scale": 0.5
}
```

### Pricing
- **Base Rate:** $0.07 per second of generated video.
- **5-second clip:** $0.35
- **10-second clip:** $0.70
*Pricing is based on successful generation and is subject to FAL.ai's pay-per-use billing.* [FAL Pricing](https://fal.ai/pricing)

## API — via Original Source (BYO-key direct)
The model creator, **Kuaishou**, offers a direct API via **Kling AI**.
- **Endpoint:** `https://api.klingai.com/v1/videos/image-to-video`
- **Auth Method:** `Authorization: Bearer <API Token>` (Generated using AccessKey + SecretKey).
- **Additional Features:** The native API often provides early access to features like **Motion Brush** (mask-based motion control) and **Advanced Camera Control** (pan, tilt, zoom, roll) that may not always be exposed in the standard FAL interface.
- **Official Docs:** [Kling AI API Specification](https://klingai.com/quickstart/klingai-video-o1-user-guide)

## Prompting best practices
- **Describe Motion, Not Just Subjects:** Since the image already provides the subject, focus your prompt on *what happens*. Use verbs like "dissolving," "zooming," "cascading," or "bursting."
- **Cinematic Keywords:** Keywords like "slow-motion," "tracking shot," "depth of field," and "dynamic lighting" significantly improve the "Pro" output quality.
- **Prompt Structure:** [Action of Subject] + [Camera Movement] + [Lighting/Atmosphere Changes].
- **Avoid Over-prompting:** The Turbo model is efficient; very long, contradictory prompts can lead to "morphing" (unnatural limb movements).
- **Good Prompt:** "The woman turns her head and smiles warmly towards the camera, soft sunlight filtering through the trees, cinematic depth of field."
- **Bad Prompt:** "Woman, smiling, forest, sun, 4k, high quality, video." (Too static, lacks motion instructions).

## Parameter tuning guide
- **CFG Scale (0.5):** This is the "sweet spot" for Turbo. Increasing it beyond 0.7 often results in oversaturated colors and jittery motion. Decreasing it below 0.3 leads to the video ignoring the prompt almost entirely.
- **Duration:** 5 seconds is recommended for fast actions (explosions, quick turns). 10 seconds is better for slow reveals and landscape pans.
- **Tail Image (End Frame):** This is the model's most powerful tool for storytellers. If you have two scenes that must connect, providing both the `image_url` and `tail_image_url` ensures a smooth, AI-interpolated transition between the two specific points.

## Node inputs/outputs (for workflow apps)
- **Inputs:**
    - `Prompt` (Text)
    - `Source Image` (Image/URL)
    - `End Image` (Image/URL, optional)
    - `Duration` (Select: 5s, 10s)
    - `Guidance (CFG)` (Slider: 0-1)
- **Outputs:**
    - `Generated Video` (Video/URL)
- **Chain-friendly with:**
    - **Flux.1 [dev]:** Generate the high-quality source image first.
    - **ElevenLabs:** Generate a voiceover to overlay on the resulting video.
    - **Topaz AI (external):** For upscaling the 1080p output to 4K.

## Notes & gotchas
- **Aspect Ratio:** The output video will inherit the aspect ratio of the `image_url` provided. Ensure your image is formatted (e.g., 16:9) before sending.
- **Safety Filter:** Kling has a very strict content policy. Images or prompts containing prohibited content (violence, NSFW, political figures) will result in an immediate error or a blank video.
- **Temporal Stability:** While excellent, fast-moving limbs or complex hands may still occasionally "morph." Use `negative_prompt` with "extra limbs, deformed" to mitigate this.

## Sources
- [FAL.ai Kling Documentation](https://fal.ai/models/fal-ai/kling-video/v2.5-turbo/pro/image-to-video/api)
- [Kling AI Official Site](https://klingai.com/)
- [Kuaishou Technology Research](https://github.com/Kwai-VGI/Kling) (Secondary)
- [AIML API Model Card](https://aimlapi.com/models/kling-video-v2-5-turbo-pro-i2v) (Secondary)