MiniMax Image 01 API

Overview

MiniMax Image 01 is an image generation model for text-to-image generation and single-reference image editing. It supports flat per-image pricing, up to 9 generated images per task, flexible size input, and preset output sizing through resolution + aspect_ratio.

Capability	Value
Model ID	`minimax-image-01`
Modes	`text-to-image`, `image-to-image`
Prompt length	1-1500 characters
Reference images	Exactly 1 URL for `image-to-image`
Images per task	`num_images` supports 1-9
Resolution tiers	`1K`, `2K`
Aspect ratios	`1:1`, `16:9`, `4:3`, `3:2`, `2:3`, `3:4`, `9:16`, `21:9`
Size input	`1024*1024`, `1024x1024`, `1024X1024`
Seed range	`-1` to `2147483647`
Prompt optimizer	`true`, `false`

Endpoint and authentication

Base URL:

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

Method	Endpoint	Purpose
`POST`	`/generateTask/minimax-image-01`	Submit a generation task
`GET`	`/statusTask/minimax-image-01?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/minimax-image-01" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "mode": "text-to-image",
      "prompt": "a cinematic panda standing in a rainy neon alley",
      "resolution": "2K",
      "aspect_ratio": "16:9",
      "num_images": 3,
      "prompt_optimizer": false,
      "seed": -1
    }
  }'

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/minimax-image-01?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/image-1.png\",\"https://file.apixo.ai/image-2.png\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "UPSTREAM_ERROR",
    "failMsg": "Generation failed",
    "createTime": 1767965610929,
    "completeTime": 1767965620132
  }
}

Request body

Text-to-image

{
  "input": {
    "mode": "text-to-image",
    "prompt": "a fashion editorial portrait with dramatic side lighting",
    "resolution": "2K",
    "aspect_ratio": "3:4",
    "num_images": 2,
    "prompt_optimizer": false
  }
}

Image-to-image

{
  "input": {
    "mode": "image-to-image",
    "prompt": "transform this image into a watercolor illustration",
    "image_urls": [
      "https://example.com/reference.png"
    ],
    "size": "1280x720",
    "num_images": 3,
    "prompt_optimizer": true,
    "seed": 42
  }
}

Parameters

string

default:"async"

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

string

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

object

required

MiniMax Image 01 input parameters.

Show properties

string

required

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

string

required

Text prompt describing the desired image or edit. Supports 1-1500 characters after trimming whitespace.

string[]

Reference image URLs. Required for image-to-image. Exactly 1 public image URL is supported.

string

default:"1024*1024"

Optional explicit output size. Supports WIDTH*HEIGHT, WIDTHxHEIGHT, and WIDTHXHEIGHT, for example 1024*1024, 1024x1024, or 1024X1024. Width and height must each be between 512 and 2048. If a dimension is not divisible by 8, APIXO automatically normalizes it to the nearest valid multiple of 8.

string

Optional output resolution preset. Supported values: 1K, 2K. When resolution + aspect_ratio and size are both provided, resolution + aspect_ratio takes precedence.

string

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

integer

default:"1"

Number of images to request. Supported range: 1-9.

boolean

default:"false"

Whether to enable prompt optimization before generation.

integer

default:"-1"

Random seed. Supported range: -1 to 2147483647. Use -1 for non-deterministic output.

Size presets from `resolution + aspect_ratio`

When resolution + aspect_ratio is provided, APIXO resolves the final output size using these presets:

Aspect ratio	`1K` size	`2K` size
`1:1`	`1024x1024`	`2048x2048`
`16:9`	`1280x720`	`2048x1152`
`4:3`	`1152x864`	`2048x1536`
`3:2`	`1248x832`	`2048x1368`
`2:3`	`832x1248`	`1368x2048`
`3:4`	`864x1152`	`1536x2048`
`9:16`	`720x1280`	`1152x2048`
`21:9`	`1344x576`	`2048x880`

Response format

Submit task response

POST /generateTask/minimax-image-01 returns a task ID when the task is accepted:

integer

API status code. 200 means the task was accepted.

string

Human-readable status message.

string

Unique task identifier used with the status endpoint.

Status response fields

string

Unique task identifier.

string

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

string

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

string

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

string

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

integer

Task creation timestamp in Unix milliseconds.

integer

Task completion timestamp in Unix milliseconds. Present after completion.

integer

Processing duration in milliseconds. Present after successful completion.

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/minimax-image-01" \
  -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": "text-to-image",
      "prompt": "a clean product photo of wireless earbuds on soft stone",
      "resolution": "1K",
      "aspect_ratio": "1:1",
      "num_images": 2
    }
  }'

See Webhooks for delivery requirements and retry behavior.

Billing

MiniMax Image 01 is billed per generated image using a flat public APIXO price.

Unit	APIXO price
Per generated image	`$0.0035 / image`

Billing behavior:

precharge = requested num_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.

Latency and polling

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

Resolution	Typical generation time	Recommended first poll	Poll interval
`1K`	15s-30s	15s after task creation	3s-5s
`2K`	20s-40s	20s after task creation	3s-5s

For high-concurrency production workloads, use callback mode to avoid frequent polling.

Size rules

size supports *, x, and X as separators.
Explicit size requires width and height to each stay within 512-2048.
If a size dimension is not divisible by 8, APIXO rounds it to the nearest valid multiple of 8.
When both size and resolution + aspect_ratio are provided, resolution + aspect_ratio takes precedence.
If neither size nor resolution + aspect_ratio is provided, the default output size is 1024*1024.

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, 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	Check permissions and route strategy
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Server 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
`INVALID_PARAMETER`	A model parameter is unsupported, out of range, or malformed	Check `mode`, `size`, `resolution`, `aspect_ratio`, and `image_urls`
`INVALID_IMAGE_URL`	The reference image URL could not be fetched or decoded	Use a public, direct image URL
`INSUFFICIENT_BALANCE`	The account does not have enough balance for the task	Add balance before retrying
`UPSTREAM_ERROR`	Provider-side failure	Retry with backoff or try another route
`TIMEOUT`	Generation did not finish in time	Retry, reduce input complexity, or use callback mode

See Error Codes for the full error reference.

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Text-to-image

​Image-to-image

​Parameters

​Size presets from resolution + aspect_ratio

​Response format

​Submit task response

​Status response fields

​Webhook callback mode

​Billing

​Latency and polling

​Size rules

​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-image

Image-to-image

Parameters

Size presets from `resolution + aspect_ratio`

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Size rules

Errors and troubleshooting

HTTP errors

Task failure codes

Related links