> ## Documentation Index > Fetch the complete documentation index at: https://docs.imini.ai/llms.txt > Use this file to discover all available pages before exploring further. # GPT Image 2 > OpenAI gpt-image-2 image generation model. 1K / 2K / 4K resolutions with three quality tiers, up to 6 reference images. ## OpenAPI ````yaml /en/openapi/images/gpt-image-2.yaml POST /v1/images/generate openapi: 3.1.0 info: title: GPT Image 2 version: '1.0' description: >- OpenAI gpt-image-2 image generation model. 1K / 2K / 4K resolutions with three quality tiers (low / medium / high) . servers: - url: https://openapi.imini.ai/imini/router security: - ApiKeyAuth: [] paths: /v1/images/generate: post: summary: GPT Image 2 description: > Submit an asynchronous image generation task. You will need to poll the query endpoint to retrieve the result. > Model ID: `openai/gpt-image-2` · Underlying: OpenAI gpt-image-2 operationId: generateGptImage2 requestBody: required: true content: application/json: schema: type: object required: - model - prompt - resolution - aspect_ratio - quality properties: model: type: string description: Fixed value `openai/gpt-image-2`. prompt: type: string description: >- The prompt. Up to **32000** characters. Supports English and Chinese; detail-rich descriptions yield better results. example: >- A majestic snow-capped mountain at golden hour, ultra-realistic photography images: type: array description: >- Reference image list. **Omitting or passing an empty array** means text-to-image mode; passing images switches to image-to-image / style reference mode. Up to **3** images. items: type: object properties: url: type: string description: >- Reference image address, in one of two forms: **1)** A publicly accessible URL (starting with `http://` or `https://`); **2)** A Data URI base64 encoding (starting with `data:image/`, e.g., `data:image/png;base64,iVBORw0KGgo...`). Supported formats: `png` / `jpg` / `webp`, decoded size up to **10MB**. reference_type: type: string description: |- Reference type. Optional — defaults to `asset`. - `asset` — content reference default: asset enum: - asset maxItems: 3 resolution: type: string description: 'Output resolution tier (required): `1K` / `2K` / `4K`.' enum: - 1K - 2K - 4K aspect_ratio: type: string description: >- Output aspect ratio (required). Allowed values: `1:1` `2:3` `3:2` `3:4` `4:3` `4:5` `5:4` `9:16` `16:9` `21:9` `9:21` enum: - '1:1' - '2:3' - '3:2' - '3:4' - '4:3' - '4:5' - '5:4' - '9:16' - '16:9' - '21:9' - '9:21' quality: type: string description: >- Rendering quality (required): - `low` — fastest and cheapest, for drafts and batch generation - `medium` — balanced - `high` — most detailed, for finals and cover art Quality is orthogonal to resolution: within a given `resolution`, `quality` only changes visual detail and cost, not the output dimensions. enum: - low - medium - high num: type: integer description: Number of images to generate per call, 1-10. default: 1 minimum: 1 maximum: 10 examples: Text to Image: summary: Text to Image value: model: openai/gpt-image-2 prompt: >- A cute shiba inu in a spacesuit standing on the moon, 3D cartoon style aspect_ratio: '1:1' resolution: 1K quality: medium Image Edit: summary: Image Edit value: model: openai/gpt-image-2 prompt: Blend these two images into one coherent scene images: - url: https://example.com/input-1.png reference_type: asset - url: https://example.com/input-2.png reference_type: asset aspect_ratio: '16:9' resolution: 2K quality: high Image Edit (base64): summary: Image Edit (base64) value: model: openai/gpt-image-2 prompt: Add a hot-air balloon in the sky images: - url: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA... reference_type: asset aspect_ratio: '4:3' resolution: 1K quality: medium responses: '200': description: Submitted successfully content: application/json: schema: oneOf: - title: Submit Success (Pending) type: object properties: task_id: type: string description: Unique task ID, used for subsequent polling example: task_2041350318103396352 model: type: string description: The model ID used for this task example: openai/gpt-image-2 created_at: type: string description: Task creation time example: '2026-04-23T03:00:17.062Z' request_id: type: string description: Unique request ID example: 285f20ce-8158-401b-945c-7bc6a7ef6ead '400': description: Validation Error (e.g. invalid parameter, invalid prompt) content: application/json: schema: type: object properties: error: type: object properties: code: type: string description: Error code, e.g., INVALID_PROMPT example: INVALID_PROMPT message: type: string description: Error message details example: Prompt contains disallowed content status: type: integer description: HTTP status code example: 400 request_id: type: string description: Unique request identifier example: req_abc123 security: - ApiKeyAuth: [] components: securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API Key description: > Pass `Authorization: Bearer ` in the request header. Go to the [API Keys management page](https://imini.ai/api-keys) to create and manage API Keys. ````