> ## Documentation Index > Fetch the complete documentation index at: https://docs.modellix.ai/llms.txt > Use this file to discover all available pages before exploring further. # GPT Image 2.5 Sunburst Edit > [Core Function] GPT Image 2.5 Sunburst Edit is a quality-oriented image editing model. [Strengths] Supports up to 16 input images, optional mask-based local edits, resolution tiers up to 4K, and transparent backgrounds. [Best For] Product image changes, masked object replacements, and edits guided by multiple reference images. [Limitations] Do NOT use this for editing more than 16 input images or selecting arbitrary pixel dimensions. Exact input fidelity control is not exposed. [Routing] Choose this variant when image quality is the priority; use GPT Image 2.5 Flare Edit when speed is the priority. ## OpenAPI ````yaml /media-model-api/openai/openai-i2i.json post /openai/gpt-image-2.5-sunburst-edit openapi: 3.1.0 info: description: The image-to-image (image editing) models API from OpenAI. version: 1.0.0 contact: name: Modellix Support email: support@modellix.ai title: OpenAI Image-to-Image Models API servers: - url: https://api.modellix.ai/api/v1 description: The image-to-image models API from OpenAI. security: - bearerAuth: [] paths: /openai/gpt-image-2.5-sunburst-edit: post: tags: - GPT Image Edit summary: GPT Image 2.5 Sunburst Edit description: >- [Core Function] GPT Image 2.5 Sunburst Edit is a quality-oriented image editing model. [Strengths] Supports up to 16 input images, optional mask-based local edits, resolution tiers up to 4K, and transparent backgrounds. [Best For] Product image changes, masked object replacements, and edits guided by multiple reference images. [Limitations] Do NOT use this for editing more than 16 input images or selecting arbitrary pixel dimensions. Exact input fidelity control is not exposed. [Routing] Choose this variant when image quality is the priority; use GPT Image 2.5 Flare Edit when speed is the priority. operationId: gptImage25SunburstEditAsync requestBody: description: Request payload for GPT Image 2.5 Sunburst Edit. required: true content: application/json: schema: $ref: '#/components/schemas/GPTImage25EditRequest' examples: basic: summary: Basic image editing value: images: - https://example.com/input.png prompt: Add a watercolor effect to this image masked_edit: summary: Edit a masked region value: images: - https://example.com/input.png prompt: Replace the red square with a green circle mask: https://example.com/mask.png aspect_ratio: '4:5' resolution: 1K quality: high responses: '200': description: >- Task submitted successfully. Poll the URL in data.get_result.url using [Query Task Result](/api/get-task-result) to retrieve the generated image. content: application/json: schema: $ref: '#/components/schemas/AsyncTaskResponse' example: code: 0 message: success data: status: pending task_id: 12345678-1234-4234-8234-123456789abc model_id: openai/gpt-image-2.5-sunburst-edit get_result: method: GET url: >- https://api.modellix.ai/api/v1/tasks/12345678-1234-4234-8234-123456789abc '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: GPTImage25EditRequest: description: Request payload shared by GPT Image 2.5 Sunburst Edit and Flare Edit. type: object required: - images - prompt additionalProperties: false properties: prompt: type: string description: >- Description of the desired edits, from 1 to 32,000 Unicode characters. minLength: 1 maxLength: 32000 example: Replace the red square with a green circle images: type: array description: Input image URLs as a string array, with 1 to 16 images. minItems: 1 maxItems: 16 items: type: string format: uri minLength: 1 example: - https://example.com/input.png mask: type: string format: uri minLength: 1 description: >- Optional PNG mask URL for local editing. The mask must have an alpha channel and match the first input image's dimensions. Transparent areas indicate the area to edit. example: https://example.com/mask.png aspect_ratio: type: string description: >- Output aspect ratio. Can be set independently of resolution; omitting it uses 1:1. default: '1:1' enum: - '1:1' - '3:2' - '2:3' - '3:4' - '4:3' - '4:5' - '5:4' - '9:16' - '16:9' - '21:9' example: '16:9' resolution: type: string description: >- Output resolution tier. Can be set independently of aspect_ratio; omitting it uses 1K. Pixel dimensions depend on both parameters: 1:1 + 1K gives 1024x1024, 1:1 + 4K gives 2880x2880, and 16:9 + 4K gives 3840x2160. default: 1K enum: - 1K - 2K - 4K example: 4K quality: type: string description: Output quality level. Defaults to low. default: low enum: - low - medium - high - xhigh - max example: high background: type: string description: >- Background mode: auto lets the model choose, opaque requests an opaque background, and transparent requests a transparent background with PNG output. default: auto enum: - auto - opaque - transparent example: transparent AsyncTaskResponse: description: Response object for asynchronous task submission. type: object required: - code - message - data properties: code: type: integer description: Response code, 0 indicates success example: 0 message: type: string description: Response message example: success data: description: Detailed data about the submitted asynchronous task. type: object required: - status - task_id - model_id properties: status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_id: type: string description: Unique task identifier for status polling example: task_abc123xyz model_id: type: string description: Model identifier used for this task example: gpt-image-2-edit ErrorResponse: description: Standard error response object. type: object required: - code - message properties: code: type: integer description: Error code example: 400 message: type: string description: Error message example: Invalid request parameters details: type: object description: Additional error details additionalProperties: true responses: BadRequest: description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' Unauthorized: description: Authentication required or invalid content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' TooManyRequests: description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````