promptstringrequired
Text prompt for video generation. Either prompt or multi_prompt must be provided, but not both.
Kling V3 4K Text to Video
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kwaivgi/kling-video/v3/4k/text-to-videoKling V3 4K Text to Video by Kuaishou turns a text prompt into a 3-15 second native 4K video with optional native audio.
Try the model
Playground
Input
Text prompt for video generation. Either prompt or multi_prompt must be provided, but not both.
Additional Settings More
Customize your input with more control.
The aspect ratio of the generated image. Allowed values: 16:9, 9:16, 1:1.
The duration of the generated video in seconds Allowed values: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
Whether to generate native audio for the video. Supports Chinese and English voice output. Other languages are automatically translated to English. For English speech, use lowercase letters; for acronyms or proper nouns, use uppercase.
List of prompts for multi-shot video generation. If provided, overrides the single prompt and divides the video into multiple shots with specified prompts and durations.
The type of multi-shot video generation. 'intelligent' lets the model automatically determine shot structure. Allowed values: customize, intelligent.
ResultExample
What would you like to do next?
Examples
Select an example to load its inputs and result into the playground.
- Open result ↗
Input
{ "prompt": "Close-up of glowing fireflies dancing in a dark forest at twilight. Soft bioluminescent particles float through the air. Shallow depth of field, bokeh lights in background. Magical atmosphere, gentle movement." }
Kling V3 4K Text to Video
Kling V3 4K text-to-video: write a scene and get back a 3–15 second clip, with native audio and multi-shot control. Output is native 4K.
Fields
| Field | Type | Default | Notes |
|---|---|---|---|
prompt | string, required | — | Up to 2,500 characters. |
aspect_ratio | 16:9 / 9:16 / 1:1 | 16:9 | Output frame shape. |
duration | 3–15 | 5 | Output length in seconds. |
generate_audio | boolean | true | Generate native audio with the clip. |
multi_prompt | object[] | — | Optional list of shots, each with its own prompt and duration. |
shot_type | customize / intelligent | customize | customize follows your multi_prompt shot list; intelligent lets the model plan the cuts. |
Billing
You pay $0.42 per output second, with or without audio.
| Output | Price |
|---|---|
| 3s | $1.26 |
| 5s (default) | $2.10 |
| 10s | $4.20 |
| 15s | $6.30 |
Failed runs are not charged.
Prompting
- Describe subject, action, camera move, and light in order.
- For several shots, use
multi_promptwith one entry per shot.
Limits
- Clips are 3–15 seconds.
Also on SandBase
Other Kling V3 4K endpoints and tiers: kwaivgi/kling-video/v3/4k/image-to-video, kwaivgi/kling-video/v3/standard/text-to-video, kwaivgi/kling-video/v3/pro/text-to-video.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "kwaivgi/kling-video/v3/4k/text-to-video",
"prompt": "Close-up of glowing fireflies dancing in a dark forest at twilight. Soft bioluminescent particles float through the air. Shallow depth of field, bokeh lights in background. Magical atmosphere, gentle movement.",
"duration": 5,
"shot_type": "customize",
"aspect_ratio": "16:9",
"generate_audio": true
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
status=$(printf '%s' "$result" | jq -r .status)
case "$status" in completed|failed|timeout) break ;; esac
sleep 2
result=$(curl --fail-with-body --silent \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
"https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"2. Authentication
Create a SandBase API key and set it in your server environment. All requests use Bearer authentication.
export SANDBASE_API_KEY="YOUR_API_KEY"Keep the key on your server. Do not expose it in browser code or commit it to a repository.
3. Queue
Submit a request
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
Fetch request status and result
Use the returned run ID to poll until the status is completed, failed or timeout. Read output only after completed.
curl "https://api.sandbase.ai/v1/run/$RUN_ID" \
-H "Authorization: Bearer $SANDBASE_API_KEY"4. Files
Hosted files
Pass a publicly accessible file URL in the model’s image, video or audio field. Supported formats and limits are shown beside each Playground input.
Uploading images
Use the upload or replace control on supported image fields in the Playground. Video URL fields accept a hosted driving video; they do not imply video-upload support.
5. Schema
Input
durationinteger
The duration of the generated video in seconds
Default: 5
Possible values: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
shot_typestring
The type of multi-shot video generation. 'intelligent' lets the model automatically determine shot structure.
Default: "customize"
Possible values: "customize", "intelligent"
aspect_ratiostring
The aspect ratio of the generated image.
Default: "16:9"
Possible values: "16:9", "9:16", "1:1"
multi_promptarray
List of prompts for multi-shot video generation. If provided, overrides the single prompt and divides the video into multiple shots with specified prompts and durations.
generate_audioboolean
Whether to generate native audio for the video. Supports Chinese and English voice output. Other languages are automatically translated to English. For English speech, use lowercase letters; for acronyms or proper nouns, use uppercase.
Default: true
{
"model": "kwaivgi/kling-video/v3/4k/text-to-video",
"prompt": "Close-up of glowing fireflies dancing in a dark forest at twilight. Soft bioluminescent particles float through the air. Shallow depth of field, bokeh lights in background. Magical atmosphere, gentle movement.",
"duration": 5,
"shot_type": "customize",
"aspect_ratio": "16:9",
"generate_audio": true
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
[
{
"poster": "https://static.sandbase.ai/examples/posters/b58a784a894237addece.jpg",
"source": "Kling AI official schema mirror",
"source_url": "https://kling.ai/document-api/guides/get-started/overview",
"url": "https://static.sandbase.ai/examples/a320ac54-733b-4c48-9e1c-e34183e1f2a5/output/9b7ab3bc-23c2-492c-aafe-34840d1a31a1.mp4"
}
]