Kling 2.6

Overview

Kling 2.6 is Kuaishou’s audio-visual video model for generating short clips with optional speech, sound effects, ambience, and background audio. Use this page when you are ready to call the API after trying the model in the APIXO playground.

Capability	Value
Model ID	`kling-2-6`
Modes	`text-to-video`, `image-to-video`
Prompt length	1-1000 characters
Reference images	1-2 URLs for `image-to-video`
Aspect ratios	`1:1`, `9:16`, `16:9` for `text-to-video`
Durations	`5`, `10` seconds
Audio	Required `sound` toggle: `true` or `false`

Endpoint and authentication

Base URL:

https://api.apixo.ai/api/v1

Method	Endpoint	Purpose
`POST`	`/generateTask/kling-2-6`	Submit a generation task
`GET`	`/statusTask/kling-2-6?taskId={taskId}`	Poll task status and retrieve results

All requests require your APIXO API key:

Authorization: Bearer YOUR_API_KEY

Submit requests also require:

Content-Type: application/json

Copy-paste async quickstart

This minimal request submits a text-to-video task and returns a taskId.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/kling-2-6" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "text-to-video",
      "prompt": "a rainy neon street at night with reflections on the pavement and soft traffic ambience",
      "duration": 5,
      "sound": true,
      "aspect_ratio": "16:9"
    }
  }'

Successful response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

Save the taskId; you need it to poll for the final result.

Poll for result

curl -X GET "https://api.apixo.ai/api/v1/statusTask/kling-2-6?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Processing response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "processing",
    "createTime": 1767965610929
  }
}

Success response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://r2.apixo.ai/video.mp4\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "SensitiveContentDetected",
    "failMsg": "The input or output was flagged as sensitive. Please try again with different inputs.",
    "createTime": 1767965610929,
    "completeTime": 1767965652317
  }
}

Parse resultJson after state becomes success:

const payload = JSON.parse(data.resultJson);
const videoUrls = payload.resultUrls;

Request body

Text-to-video

{
  "request_type": "async",
  "input": {
    "mode": "text-to-video",
    "prompt": "a calm seaside sunrise with waves, distant birds, and soft narration",
    "duration": 5,
    "sound": true,
    "aspect_ratio": "16:9",
    "negative_prompt": "blur, low quality",
    "cfg_scale": 0.6
  }
}

Image-to-video

{
  "request_type": "async",
  "input": {
    "mode": "image-to-video",
    "prompt": "animate this product photo with a slow camera push and subtle ambient music",
    "duration": 10,
    "sound": true,
    "image_urls": [
      "https://example.com/start.jpg",
      "https://example.com/end.jpg"
    ],
    "negative_prompt": "jitter, distortion",
    "cfg_scale": 0.4
  }
}

Parameters

request_type

string

default:"async"

required

Result delivery mode. Use async for polling with statusTask, or callback for webhook delivery.

callback_url

string

Required when request_type is callback. Must be a public HTTPS URL that can receive the final task payload. See Webhooks.

input

object

required

Kling 2.6 input parameters.

Show properties

mode

string

required

Generation mode. Supported values: text-to-video, image-to-video.

prompt

string

required

Text prompt describing the desired video and optional audio. Supports 1-1000 characters.

duration

integer

required

Video duration in seconds. Supported values: 5, 10. Numeric strings such as "5" and "10" are accepted for compatibility.

sound

boolean

required

Whether to generate audio. Use true for speech, sound effects, ambience, or music; use false for silent video.

aspect_ratio

string

default:"1:1"

Output aspect ratio for text-to-video. Supported values: 1:1, 9:16, 16:9. This field is not forwarded for image-to-video.

image_urls

string[]

Reference image URLs. Required for image-to-video. Supports 1-2 URLs. The first image is the start/reference frame; the second image can be used as an end frame on routes that support start/end-frame control.

negative_prompt

string

Optional negative prompt to reduce unwanted artifacts. Maximum length is 500 characters.

cfg_scale

number

Optional guidance scale. Supported range: 0 to 1 in 0.1 increments.

Response format

Submit task response

POST /generateTask/kling-2-6 returns a task ID when the task is accepted:

code

integer

API status code. 200 means the task was accepted.

message

string

Human-readable status message.

data.taskId

string

Unique task identifier used with the status endpoint.

Status response fields

taskId

string

Unique task identifier.

state

string

Current task state: pending, processing, success, or failed.

resultJson

string

JSON string containing the generated video URLs. Present when state is success.

failCode

string

Machine-readable failure code. Present when state is failed.

failMsg

string

Human-readable failure message. Present when state is failed.

createTime

integer

Task creation timestamp in Unix milliseconds.

completeTime

integer

Task completion timestamp in Unix milliseconds. Present after completion.

costTime

integer

Processing duration in milliseconds. Present after successful completion when available.

Webhook callback mode

Use callback mode when your backend should receive the final result automatically instead of polling.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/kling-2-6" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/webhooks/apixo",
    "input": {
      "mode": "image-to-video",
      "prompt": "animate this mountain view with moving clouds, wind, and distant birds",
      "duration": 5,
      "sound": true,
      "image_urls": [
        "https://example.com/mountain-start.jpg"
      ]
    }
  }'

The callback payload uses the same code, message, and data shape as the status response. See Webhooks for delivery requirements and retry behavior.

Billing

Kling 2.6 is billed per output second. The selected duration and required sound value determine the total cost.

Audio setting	Unit price	Example total
`sound: false`	`$0.06 / second`	5s: `$0.30`; 10s: `$0.60`
`sound: true`	`$0.12 / second`	5s: `$0.60`; 10s: `$1.20`

For current route and market comparison pricing, see Pricing.

Latency and polling

Actual latency may vary by prompt complexity, audio requirements, provider route, and current queue load.

Duration	Typical generation time	Recommended first poll	Poll interval
`5` seconds	50s-70s	50s after task creation	5s-10s
`10` seconds	80s-100s	80s after task creation	5s-10s

For production workloads, use callback mode to avoid frequent polling while video and audio generation are still running.

Rate limits and concurrency can vary by account, API key, and route. If you receive 429, slow down requests and retry with backoff. For account-level details, see System APIs.

Errors and troubleshooting

HTTP errors

Code	Meaning	What to do
`400`	Invalid request body, mode, parameter, prompt, or media URL	Fix the request before retrying
`401`	Missing or invalid API key	Check the `Authorization` header
`402`	Insufficient balance or quota	Add balance or switch account/key
`403`	Key or route cannot access the model, or content was rejected	Check permissions and adjust content
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Server error or upstream provider error	Retry with backoff
`502`	Upstream provider error	Retry with backoff
`504`	Upstream timeout	Retry or use callback mode for long-running jobs

Task failure codes

Fail code	Meaning	What to do
`SensitiveContentDetected`	Prompt, input image, or output was flagged as sensitive	Change the prompt or input image
`InputOutputSensitiveContentDetected`	Input or output failed provider safety checks	Try different inputs
`NSFW`	NSFW content was detected	Use policy-compliant inputs
`ProhibitedContentDetected`	Content violates provider policy	Adjust the prompt or image
`PromptLengthExceeded`	Prompt exceeded the provider limit	Shorten the prompt to 1000 characters or fewer
`PromptInvalid`	Prompt was invalid or rejected	Revise the prompt
`ImageFormatIncorrect`	A reference image could not be processed	Use a public, direct JPG, PNG, or WebP URL
`Upload error`	A media upload failed or exceeded size limits	Compress or replace the image
`RateLimited`	Provider rate limit was reached	Retry later with backoff
`Timeout`	Provider timed out	Retry, simplify the request, or use callback mode

See Error Codes for the full error reference.

Getting Started

Image Models

Video Models

Audio Models

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Text-to-video

Image-to-video

Parameters

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Errors and troubleshooting

HTTP errors

Task failure codes

Getting Started

Image Models

Video Models

Audio Models

Documentation Index

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Text-to-video

​Image-to-video

​Parameters

​Response format

​Submit task response

​Status response fields

​Webhook callback mode

​Billing

​Latency and polling

​Errors and troubleshooting

​HTTP errors

​Task failure codes

​Related links

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Text-to-video

Image-to-video

Parameters

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Errors and troubleshooting

HTTP errors

Task failure codes

Related links