Generate Kling 4.0 videos from a text prompt. 3-30s, 720p/1080p, native audio. Pay per generation, no subscription. Kling 4.0 Text-to-Video generates 3-30 second clips at 720p/1080p with native audio from a text prompt.
Kling 4.0 Text-to-Video generates 3-30 second clips at 720p/1080p with native audio from a text prompt.
About this model
Kling 4.0 Text-to-Video turns a text prompt into a 3-30 second clip at 720p or 1080p with native audio, in 16:9, 9:16, 1:1 or 21:9. Describe the scene, camera and sound in the prompt and choose the duration up to 30 seconds. To keep characters, objects or voices consistent, use Kling 4.0 Reference to Video; to direct a clip from still frames, use Kling 4.0 Keyframe to Video.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $0.157 per second at 720p ($0.785 per 5s clip) | $0.157/s at 720p, $0.235/s at 1080p. |
$0.157/s at 720p, $0.235/s at 1080p.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | Video description (max 8000 chars). | A lone astronaut walks across a red desert at sunrise, dust drifting past the camera, cinematic wide shot with wind and distant thunder |
| Duration | int | Video length in seconds (3-30). | 5 |
| Resolution | Enum (2 options) | Output resolution. | 720p |
| Aspect Ratio | Enum (4 options) | Output aspect ratio. | 16:9 |
Video description (max 8000 chars).
A lone astronaut walks across a red desert at sunrise, dust drifting past the camera, cinematic wide shot with wind and distant thunderVideo length in seconds (3-30).
5Output resolution.
720pOutput aspect ratio.
16:9Developer documentation
Write the prompt: Describe the subject, action, camera movement and sound (up to 8000 characters).
Configure output: duration (3-30s), resolution (720p or 1080p) and aspect_ratio (16:9, 9:16, 1:1, 21:9).
Submit and collect the result: The endpoint is async — poll /api/v1/predictions/{request_id}/result or pass a webhook_url.
curl -X POST https://api.muapi.ai/api/v1/kling-4.0-text-to-video \
-H "Content-Type: application/json" \
-H "x-api-key: YOUR_API_KEY" \
-d '{"prompt": "A lone astronaut walks across a red desert at sunrise, dust drifting past the camera, cinematic wide shot", "duration": 10, "resolution": "1080p", "aspect_ratio": "16:9"}'
Frequently asked
3 to 30 seconds per clip at 720p or 1080p.
Yes, native audio is generated with the video.
Not on this endpoint. Use Kling 4.0 Reference to Video for images, videos, elements and voices, or Keyframe to Video for first/last frames.
Per second of output video: $0.157/s at 720p and $0.235/s at 1080p.
The endpoint is asynchronous. Poll /api/v1/predictions/{request_id}/result or pass a webhook_url to be notified when the video is ready.