Grok Imagine Image API: xAI Text-to-Image & Image-to-Image

Overview

The model ID remains grok-image. Use the preferred REST URLs below. The previous /generateTask/grok-image and /statusTask/grok-image URLs remain supported with the same parameters and pricing. Grok Imagine Image is an xAI image model for text-to-image generation and multi-reference image-to-image workflows. Use this page when you are ready to call the API after trying the model in the APIXO playground.

Capability	Value
Model ID	`grok-image`
Modes	`text-to-image`, `image-to-image`
Prompt length	1-5000 characters
Reference images	1-5 URLs for `image-to-image`
Aspect ratios	`1:1`, `3:2`, `2:3`, `16:9`, `9:16` for `text-to-image`
Output	Image URL in `resultJson.resultUrls`

Endpoint and authentication

Base URL:

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

Method	Endpoint	Purpose
`POST`	`/generateTask/grok-imagine-image`	Submit a generation task
`GET`	`/statusTask/grok-imagine-image?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/grok-imagine-image" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "text-to-image",
      "prompt": "a cozy cyberpunk cafe with neon lights",
      "aspect_ratio": "3:2"
    }
  }'

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/grok-imagine-image?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.png\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965635929,
    "costTime": 25000
  }
}

Failed response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "SensitiveContent",
    "failMsg": "Content was rejected by safety checks, please adjust the prompt",
    "createTime": 1767965610929,
    "completeTime": 1767965620132,
    "costTime": 9039
  }
}

Parse resultJson after state becomes success:

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

Request body

Text-to-image

{
  "request_type": "async",
  "input": {
    "mode": "text-to-image",
    "prompt": "a serene mountain landscape at dawn",
    "aspect_ratio": "16:9"
  }
}

Image-to-image

{
  "request_type": "async",
  "input": {
    "mode": "image-to-image",
    "prompt": "blend these references into a cinematic portrait",
    "image_urls": [
      "https://example.com/subject.png",
      "https://example.com/style.png"
    ]
  }
}

Parameters

string

default:"async"

Result delivery mode. Omit this field or use async for polling with statusTask, or use callback for webhook delivery.

string

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

object

required

Grok Imagine Image 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 1-5000 characters. Empty prompts are rejected.

string

default:"1:1"

Output aspect ratio for text-to-image. Supported values: 1:1, 3:2, 2:3, 16:9, 9:16. This parameter is not forwarded for image-to-image.

string[]

Reference image URLs. Required for image-to-image. Supports 1-5 URLs. Each URL must be public and each array item must be a non-empty string. Supported formats are JPG, JPEG, PNG, and WEBP, with a maximum size of 10 MB per image.

Response format

Submit task response

POST /generateTask/grok-imagine-image 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 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/grok-imagine-image" \
  -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",
      "aspect_ratio": "1:1"
    }
  }'

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

Billing

New non-LLM requests use 1 credit = $0.001. Calculate the full amount, including billable quantity and add-ons, apply the applicable account discount, then round the request total upward to the next whole credit. Agreed fixed unit prices retain their precision and replace the standard price and discount; final rounding still applies. See credit conversion and rounding. The rates below match the main API Pricing catalog’s public base-price table updated on October 30, 2026. Check that page for current rates and any account discount before budgeting. Text-to-image is billed once per request and returns two images by default. The request price covers those outputs. Image-to-image is billed per generated image.

Mode	APIXO price	Market display reference
`text-to-image`	`$0.040 / request`	`$0.060 / request`
`image-to-image`	`$0.040 / image`	`$0.060 / image`

The market display reference is a separately specified comparison value and does not affect the amount charged. For example, a text-to-image request that returns its default two images costs $0.040 in total, before any account discount. For current API rates in USD, see API pricing.

Latency and polling

Actual latency may vary by prompt complexity, reference image access, queue load, and result storage time.

Mode	Typical generation time	Recommended first poll	Poll interval
`text-to-image`	About 25s on average	15s after task creation	3s
`image-to-image`	About 25s on average	15s after task creation	3s

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

Result URLs are valid for 15 days. Download and store important outputs promptly. Prompts can be written in English or Chinese. More specific scene, style, lighting, and composition details usually produce better results. Output is PNG by default; if you need transparency, describe that requirement in the prompt. 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, missing `mode`, missing `prompt`, invalid `aspect_ratio`, malformed `image_urls`, or inaccessible image 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
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Internal error or unknown task failure	Retry with backoff or contact support if it persists
`502`	Service or network error	Retry with backoff

Validation notes

Parameter	Backend behavior
`input.mode`	Required for routing. Must be `text-to-image` or `image-to-image`.
`input.prompt`	Required string. Must not be empty and must not exceed 5000 characters.
`input.aspect_ratio`	Optional for `text-to-image`. Must be `1:1`, `3:2`, `2:3`, `16:9`, or `9:16` if provided. Defaults to `1:1` for `text-to-image`.
`input.image_urls`	Required and non-empty for `image-to-image`. Must be an array of strings and cannot contain more than 5 images.

Task failure codes

failCode identifies the task failure. Common values include:

Fail code	Meaning	What to do
`PromptInvalid`	Prompt was invalid or rejected	Rewrite the prompt and retry
`SensitiveContent`	Prompt or input/output content was rejected by safety checks	Change the prompt or reference image
`ImageFormatIncorrect`	Reference image format could not be processed	Use a public, direct image URL in a common image format
`RateLimited`	A rate limit was reached	Retry with exponential backoff
`Timeout`	The task timed out	Retry later or use callback mode
`Unknown error`	An unknown task failure occurred	Retry with backoff or contact support with the `taskId`

See Error Codes for the full error reference. To animate an image after generation, use a successful grok-image task with Grok Imagine Video. This creates a new video from an image result; it does not extend an existing video.

MCP integration

The complete model schema declares result decoding in mcp.result and supported file bindings in mcp.attachments. These are client integration metadata, not generation input parameters. Attachment paths: image_urls. Preserve the user’s file order. Model parameter validation remains on the API.

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Text-to-image

​Image-to-image

​Parameters

​Response format

​Submit task response

​Status response fields

​Webhook callback mode

​Billing

​Latency and polling

​Errors and troubleshooting

​HTTP errors

​Validation notes

​Task failure codes

​MCP integration

​Related links

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Text-to-image

Image-to-image

Parameters

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Errors and troubleshooting

HTTP errors

Validation notes

Task failure codes

MCP integration

Related links