# Kling | o3 | 4K | Text to Video

Kling Native 4K generates professional-grade 4K video in a single step, eliminating the need for post-production upscaling.

## API Information

- **Model Slug:** kling-o3-4k-text-to-video
- **Branded URL:** https://www.eachlabs.ai/kling/kling-o3/kling-o3-4k-text-to-video
- **Provider:** Kling
- **Category:** Text to Video
- **Output Type:** video
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** Pricing is calculated per second of generated 4K video: $0.42/sec (no audio), $0.63/sec (with audio). Voice control unsupported on Kling 4K.
- **Estimated Processing Time:** 200 seconds
- **Last Updated:** 2026-06-17
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/kling-o3-4k-text-to-video

## Pricing

- **Charge Type:** dynamic
- **Pricing Details:** Pricing is calculated per second of generated 4K video: $0.42/sec (no audio), $0.63/sec (with audio). Voice control unsupported on Kling 4K.

### Pricing Rules

| Condition | Pricing |
| --- | --- |
| Rule 1 | Pricing is calculated per second of generated 4K video: $0.42/sec (no audio), $0.63/sec (with audio). Voice control unsupported on Kling 4K. |

## Input Schema

No input parameters documented.

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "kling-o3-4k-text-to-video",
  "input": {}
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated video)",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "X-API-Key: YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `X-API-Key` |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**Kling | o3 | 4K | Text to Video Overview**

The **Kling | o3 | 4K | Text to Video** model from Kling transforms text prompts into cinema-grade 4K videos, solving the challenge of creating high-resolution, production-ready footage without upscaling or post-processing. Developed by Kuaishou as part of the Kling 3.0 family, it stands out with native 4K output and a bias toward stylized, anime-inspired visuals, delivering crisp clarity, stable consistency, and expressive motion in every frame. This text-to-video tool excels in generating 3-15 second clips with physics-aware dynamics and optional audio, making it ideal for creators needing professional results directly from natural language descriptions. Access it seamlessly via APIs on platforms like each::labs for efficient workflows in content production.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `X-API-Key: YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.