Kling 2.5 Turbo Pro

Overview

Kling 2.5 Turbo Pro is a Kuaishou video model for fast text-to-video and image-to-video generation. Use this page when you are ready to call the API after trying the model in the APIXO playground.

Capability	Value
Model ID	`kling-2-5-turbo-pro`
Modes	`text-to-video`, `image-to-video`
Prompt length	1-2500 characters
Duration	`5` or `10` seconds
Reference images	1-2 URLs for `image-to-video`
Tail-frame control	The second `image_urls` item is used as the final frame
Aspect ratios	`16:9`, `9:16`, `1:1` for `text-to-video`
Negative prompt	Up to 2500 characters
CFG scale	`0` to `1`, step `0.1`
Output	MP4 video URLs in `resultJson.resultUrls`

Endpoint and authentication

Base URL:

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

Method	Endpoint	Purpose
`POST`	`/generateTask/kling-2-5-turbo-pro`	Submit a generation task
`GET`	`/statusTask/kling-2-5-turbo-pro?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-2-5-turbo-pro" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "text-to-video",
      "prompt": "a cinematic drone shot over snowy mountains at sunrise",
      "duration": 5,
      "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-2-5-turbo-pro?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://file.apixo.ai/xxx.mp4\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "SensitiveContent",
    "failMsg": "Content violates the upstream content policy, please adjust the prompt",
    "createTime": 1767965610929,
    "completeTime": 1767965620132
  }
}

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 cinematic drone shot over snowy mountains at sunrise",
    "duration": 10,
    "aspect_ratio": "16:9",
    "negative_prompt": "low quality, jitter, blur",
    "cfg_scale": 0.6
  }
}

Image-to-video

{
  "request_type": "async",
  "input": {
    "mode": "image-to-video",
    "prompt": "smooth camera transition from the first frame to the final frame",
    "duration": 5,
    "image_urls": [
      "https://example.com/start.jpg",
      "https://example.com/end.jpg"
    ],
    "negative_prompt": "distortion, low quality",
    "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 2.5 Turbo Pro input parameters.

Show properties

mode

string

required

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

prompt

string

required

Text prompt describing the video. Must be non-empty after trimming and no longer than 2500 characters.

duration

integer | string

required

Output duration in seconds. Supported values: 5, 10. Numeric strings such as "5" are also accepted.

image_urls

string[]

Required for image-to-video. Supports 1-2 public image URLs. The first image is the start frame; the second image, when provided, is the tail frame.

aspect_ratio

string

default:"16:9"

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

negative_prompt

string

Negative prompt describing content to avoid. Supports up to 2500 characters. Blank values are ignored.

cfg_scale

number | string

Prompt guidance scale. Supported values are 0 through 1 in 0.1 steps, for example 0, 0.4, 0.7, or 1. Numeric strings are accepted.

Response format

Submit task response

POST /generateTask/kling-2-5-turbo-pro 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 generated video URLs in resultUrls. 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-2-5-turbo-pro" \
  -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": "make the subject turn toward camera with smooth natural motion",
      "duration": 5,
      "image_urls": [
        "https://example.com/start.jpg"
      ],
      "cfg_scale": 0.5
    }
  }'

Webhook delivery uses the same final task payload shape as the status response. See Webhooks for delivery requirements and retry behavior.

Billing

Kling 2.5 Turbo Pro is billed by video duration. The public APIXO pricing page lists this model with a starting APIXO price of $0.06 / second.

Duration	Starting APIXO price
`5` seconds	`$0.30 / video`
`10` seconds	`$0.60 / video`

For current route and market comparison pricing, see Pricing.

Latency and polling

Actual latency may vary by prompt complexity, input images, selected route, and current queue load.

Duration	Typical generation time	Recommended first poll	Poll interval
`5` seconds	30s-45s	30s after task creation	5s-10s
`10` seconds	45s-60s	30s after task creation	5s-10s

For production video workloads, use callback mode to avoid frequent polling. Download and store important output URLs promptly after completion.

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 value, or image URL shape	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 input
`404`	Task ID or route not found	Check the model endpoint and `taskId`
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Server or upstream error	Retry with backoff
`503`	Service temporarily unavailable	Retry with backoff
`504`	Upstream timeout	Retry or use callback mode for long-running jobs

Parameter validation

Field	Rule
`input.mode`	Required. Must be `text-to-video` or `image-to-video`.
`input.prompt`	Required string, non-empty after trimming, max 2500 characters.
`input.duration`	Required. Must be `5` or `10`; integer and numeric string are accepted.
`input.image_urls`	Required for `image-to-video`; must be an array of 1-2 strings.
`input.aspect_ratio`	Optional for `text-to-video`; must be `16:9`, `9:16`, or `1:1` when provided.
`input.negative_prompt`	Optional string, max 2500 characters.
`input.cfg_scale`	Optional number or numeric string from `0` to `1`, step `0.1`.

Task failure codes

Fail code	Meaning	What to do
`SensitiveContent`	Prompt, input image, or generated output violated the upstream content policy	Change the prompt or image
`PromptInvalid`	Prompt was rejected or malformed	Rewrite the prompt with clearer safe content
`PromptLengthExceeded`	Prompt exceeded model limits	Shorten the prompt
`ImageFormatIncorrect`	Input image format could not be processed	Use a public JPG, PNG, or WebP URL
`Upload error`	Image upload failed or exceeded size limits	Compress the image and retry with a direct URL
`RateLimited`	The upstream route rate limited the task	Retry later with backoff
`Timeout`	The upstream route did not finish in time	Retry, reduce input complexity, or use callback mode
`Unknown error`	The upstream route returned an unmapped failure	Retry with backoff; contact support if it persists

See Error Codes for the full error reference.

Getting Started

Image Models

Video Models

Audio Models

Kling 2.5 Turbo Pro

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

Parameter validation

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

​Parameter validation

​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

Parameter validation

Task failure codes

Related links