Seedream 5.0

Overview

Seedream 5.0 is a ByteDance image generation model for text-to-image creation and reference-guided image generation. It supports 2K and 3K output presets, optional web search, selectable output format, and flexible size input for callers who prefer explicit dimensions.

Capability	Value
Model ID	`seedream-5-0`
Modes	`text-to-image`, `image-to-image`
Prompt length	1-5000 characters
Reference images	1-14 URLs for `image-to-image`
Images per task	`max_images` is required, 1-10
Resolution tiers	`2K`, `3K`
Aspect ratios	`1:1`, `2:3`, `3:2`, `4:3`, `3:4`, `9:16`, `16:9`, `21:9`
Size input	`2K`, `3K`, `2048x2048`, `2048X2048`, `2048*2048`
Output formats	`jpeg`, `png`
Web search	`true`, `false`
Prompt optimization	`standard`

Endpoint and authentication

Base URL:

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

Method	Endpoint	Purpose
`POST`	`/generateTask/seedream-5-0`	Submit a generation task
`GET`	`/statusTask/seedream-5-0?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-image task and returns a taskId.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedream-5-0" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "mode": "text-to-image",
      "prompt": "a cozy cyberpunk cafe with neon lights, ultra detailed",
      "max_images": 1,
      "resolution": "2K",
      "aspect_ratio": "16:9",
      "output_format": "jpeg",
      "prompt_optimize_mode": "standard"
    }
  }'

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/seedream-5-0?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Success response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://file.apixo.ai/xxx.jpeg\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965644132,
    "costTime": 33203
  }
}

Request body

Text-to-image

{
  "input": {
    "mode": "text-to-image",
    "prompt": "a clean product photo of wireless earbuds on soft stone",
    "max_images": 1,
    "resolution": "2K",
    "aspect_ratio": "1:1",
    "sequential_image_generation": "disabled",
    "output_format": "jpeg",
    "prompt_optimize_mode": "standard"
  }
}

Image-to-image

{
  "input": {
    "mode": "image-to-image",
    "prompt": "make this scene look like sunrise with warm colors",
    "image_urls": [
      "https://example.com/ref1.jpg",
      "https://example.com/ref2.jpg"
    ],
    "max_images": 2,
    "resolution": "3K",
    "aspect_ratio": "3:4",
    "sequential_image_generation": "auto",
    "output_format": "png",
    "prompt_optimize_mode": "standard"
  }
}

Explicit size

{
  "input": {
    "mode": "text-to-image",
    "prompt": "a minimalist industrial poster",
    "max_images": 1,
    "size": "3072X3072",
    "output_format": "jpeg"
  }
}

Parameters

request_type

string

default:"async"

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

Seedream 5.0 input parameters.

Show properties

mode

string

required

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

prompt

string

required

Text prompt describing the desired image. Supports 1-5000 characters after trimming whitespace.

image_urls

string[]

Reference image URLs. Required for image-to-image. Accepts 1-14 public image URLs.

max_images

integer

required

Requested image count. Must be an integer from 1 to 10.

resolution

string

default:"2K"

Output resolution preset. Supported values: 2K, 3K. When resolution + aspect_ratio and size are both provided, resolution + aspect_ratio takes precedence.

aspect_ratio

string

Output aspect ratio. Supported values: 1:1, 2:3, 3:2, 4:3, 3:4, 9:16, 16:9, 21:9.

size

string

Optional explicit size or preset token. Supports 2K, 3K, and pixel strings such as 2048x2048, 2048X2048, or 2048*2048. Custom sizes may be normalized to the nearest supported value.

sequential_image_generation

string

default:"disabled"

Sequential generation mode. Supported values: disabled, auto.

prompt_optimize_mode

string

default:"standard"

Prompt optimization mode. Seedream 5.0 currently supports standard.

web_search

boolean

default:"false"

Enables web search when set to true.

output_format

string

default:"jpeg"

Output image format. Supported values: jpeg, png.

Size presets from `resolution + aspect_ratio`

When aspect_ratio is provided, Seedream 5.0 maps resolution and aspect_ratio to these output dimensions:

Aspect ratio	`2K` size	`3K` size
`1:1`	`2048x2048`	`3072x3072`
`4:3`	`2304x1728`	`3456x2592`
`3:4`	`1728x2304`	`2592x3456`
`16:9`	`2848x1600`	`4096x2304`
`9:16`	`1600x2848`	`2304x4096`
`3:2`	`2496x1664`	`3744x2496`
`2:3`	`1664x2496`	`2496x3744`
`21:9`	`3136x1344`	`4704x2016`

Response format

Submit task response

POST /generateTask/seedream-5-0 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

Task identifier used for later polling or webhook matching.

Polling and delivery guidance

Seedream 5.0 tasks are asynchronous.

Resolution	Typical generation time	Recommended first poll	Poll interval
`2K`	25s-35s	20s after task creation	3s
`3K`	35s-50s	20s after task creation	3s

For production systems, prefer callback_url instead of tight polling loops.

Billing

Seedream 5.0 is billed per generated image. The current public APIXO price is a single flat rate for this model.

Unit	APIXO price
Per generated image	`$0.0320 / image`

Billing behavior:

precharge = requested max_images * unit price
final charge = successful images * unit price

If fewer images succeed than requested, APIXO automatically adjusts the final charge to the actual number of successful outputs.

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Text-to-image

​Image-to-image

​Explicit size

​Parameters

​Size presets from resolution + aspect_ratio

​Response format

​Submit task response

​Polling and delivery guidance

​Billing

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Text-to-image

Image-to-image

Explicit size

Parameters

Size presets from `resolution + aspect_ratio`

Response format

Submit task response

Polling and delivery guidance

Billing