> ## Documentation Index > Fetch the complete documentation index at: https://docs.evolink.ai/llms.txt > Use this file to discover all available pages before exploring further. # GPT Image 1.5 Image Generation Beta > - GPT Image 1.5 (gpt-image-1.5-beta) model supports text-to-image, image-to-image, and image editing modes - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated image links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml /en/api-manual/image-series/gpt-image-1.5/gpt-image-1.5-lite-image-generation.json POST /v1/images/generations openapi: 3.1.0 info: title: gpt-image-1.5-beta API description: >- Create image tasks using AI models with support for multiple models and parameter configurations license: name: MIT version: 1.0.0 servers: - url: https://api.evolink.ai description: Production security: - bearerAuth: [] tags: - name: Image Generation description: AI image generation APIs paths: /v1/images/generations: post: tags: - Image Generation summary: gpt-image-1.5-beta API description: >- - GPT Image 1.5 (gpt-image-1.5-beta) model supports text-to-image, image-to-image, and image editing modes - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated image links are valid for 24 hours, please save them promptly operationId: createImageGeneration requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ImageGenerationRequest' examples: text_to_image: summary: Text to Image value: model: gpt-image-1.5-beta prompt: A beautiful colorful sunset over the ocean responses: '200': description: Image task created successfully content: application/json: schema: $ref: '#/components/schemas/ImageGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: invalid_request message: Invalid request parameters type: invalid_request_error '401': description: Unauthenticated, invalid or expired token content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, recharge required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: insufficient_quota message: Insufficient quota. Please top up your account. type: insufficient_quota '403': description: Access denied content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: model_access_denied message: 'Token does not have access to model: gpt-image-1.5-beta' type: invalid_request_error '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: rate_limit_exceeded message: Too many requests, please try again later type: rate_limit_error '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: internal_error message: Internal server error type: api_error components: schemas: ImageGenerationRequest: type: object required: - model - prompt properties: model: type: string description: >- Image generation model name **Backward Compatible:** The previously integrated model name `gpt-image-1.5-lite` is still supported and will be automatically mapped to `gpt-image-1.5-beta` enum: - gpt-image-1.5-beta default: gpt-image-1.5-beta example: gpt-image-1.5-beta prompt: type: string description: >- Prompt describing the image you want to generate, or describing how to edit the input image. Limited to 2000 tokens example: A beautiful colorful sunset over the ocean maxLength: 2000 size: type: string description: |- Size of the generated image, supports two formats: **Aspect Ratio Format:** - `1:1`: Square - `2:3`: Portrait - `3:2`: Landscape **Pixel Format:** - `1024x1024`: Square - `1024x1536`: Portrait - `1536x1024`: Landscape enum: - '1:1' - '2:3' - '3:2' - 1024x1024 - 1024x1536 - 1536x1024 example: 1024x1024 quality: type: string description: |- Quality of the generated image **Supported quality levels:** - `low`: Low quality, faster generation - `medium`: Medium quality - `high`: High quality, slower generation - `auto`: Automatic selection (default) enum: - low - medium - high - auto default: auto example: auto image_urls: type: array description: >- Reference image URL list for image-to-image and image editing features **Notes:** - Supports `1~16` images per request - Maximum size per image: `50MB` - Supported formats: `.jpeg`, `.jpg`, `.png`, `.webp` - Image URLs must be directly accessible by the server, or URLs that trigger direct download (typically URLs ending with image extensions like `.png`, `.jpg`) items: type: string format: uri example: - https://example.com/image1.png - https://example.com/image2.png 'n': type: integer description: Number of images to generate, currently only supports `1` enum: - 1 default: 1 example: 1 callback_url: type: string description: >- HTTPS callback URL for task completion **Callback Timing:** - Triggered when task is completed, failed, or cancelled - Sent after billing confirmation **Security Restrictions:** - HTTPS protocol only - Internal IP addresses are prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.) - URL length must not exceed `2048` characters **Callback Mechanism:** - Timeout: `10` seconds - Maximum `3` retries after failure (at `1`/`2`/`4` seconds after failure) - Callback response format is consistent with task query API - 2xx status code is considered successful, other codes trigger retry format: uri example: https://your-domain.com/webhooks/image-task-completed ImageGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1757156493 id: type: string description: Task ID example: task-unified-1757156493-imcg5zqt model: type: string description: Actual model name used example: gpt-image-1.5-beta object: type: string enum: - image.generation.task description: Task object type progress: type: integer description: Task progress percentage (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_info: $ref: '#/components/schemas/TaskInfo' description: Async task information type: type: string enum: - text - image - audio - video description: Task output type example: image usage: $ref: '#/components/schemas/Usage' description: Usage and billing information ErrorResponse: type: object properties: error: type: object properties: code: type: string description: Error code identifier message: type: string description: Error description type: type: string description: Error type TaskInfo: type: object properties: can_cancel: type: boolean description: Whether the task can be cancelled example: true estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 100 Usage: type: object description: Usage and billing information properties: billing_rule: type: string description: Billing rule enum: - per_call - per_token - per_second example: per_call credits_reserved: type: number description: Estimated credits consumption minimum: 0 example: 2.5 user_group: type: string description: User group category example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ## All APIs require Bearer Token authentication ## **Get API Key:** Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to get your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ````