> ## Documentation Index > Fetch the complete documentation index at: https://docs.goenhance.ai/llms.txt > Use this file to discover all available pages before exploring further. # Seedream 5.5 > Seedream 5.5 text-to-image and image-to-image. Pass `image_list` to use reference images (up to 10), or omit it for pure text-to-image. Always returns a single image. To split an image into editable layers, use the separate [seedream-5-5-layers](./seedream-5-5-layers) model instead. #### Transparent output Set `background` to `transparent` to get a real alpha-channel background. It works for text-to-image and with reference images, and the inputs do not need to be transparent. Set it to `auto` to let the model decide; the result tells you which background it used. Both output png. #### Pricing | What | Tokens | USD | |---|---|---| | Output, 1K or 1.5K | 1.04 | $0.0208 | | Output, 2K | 1.82 | $0.0364 | | Each reference image | 0.42 | $0.0084 | Example: a 2K image with 3 reference images costs 1.82 + 3 × 0.42 = 3.08 tokens. Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated image. ## OpenAPI ````yaml api-reference/image-api/openapi-seedream-5-5.json POST /api/v1/images/generations openapi: 3.1.0 info: title: GoEnhance API - Seedream 5.5 description: Seedream 5.5 version: 1.0.0 servers: - url: https://api.goenhance.ai security: [] paths: /api/v1/images/generations: post: tags: - ImageAPI summary: Seedream 5.5 description: >- Seedream 5.5 text-to-image and image-to-image. Pass `image_list` to use reference images (up to 10), or omit it for pure text-to-image. Always returns a single image. To split an image into editable layers, use the separate [seedream-5-5-layers](./seedream-5-5-layers) model instead. #### Transparent output Set `background` to `transparent` to get a real alpha-channel background. It works for text-to-image and with reference images, and the inputs do not need to be transparent. Set it to `auto` to let the model decide; the result tells you which background it used. Both output png. #### Pricing | What | Tokens | USD | |---|---|---| | Output, 1K or 1.5K | 1.04 | $0.0208 | | Output, 2K | 1.82 | $0.0364 | | Each reference image | 0.42 | $0.0084 | Example: a 2K image with 3 reference images costs 1.82 + 3 × 0.42 = 3.08 tokens. Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated image. parameters: - name: Authorization in: header description: '' required: false example: '{{Authorization}}' schema: type: string requestBody: content: application/json: schema: type: object properties: model: type: string enum: - seedream-5-5 description: Model name. Must be `seedream-5-5`. prompt: type: string minLength: 1 maxLength: 4000 description: Text prompt describing the image. ratio: type: string enum: - auto - '1:1' - '2:3' - '3:2' - '3:4' - '4:3' - '4:5' - '5:4' - '9:16' - '16:9' - '21:9' - '9:21' description: >- Output aspect ratio. Defaults to auto, which lets the model choose the framing from your prompt. default: auto image_size: type: string enum: - 1K - 1.5K - 2K default: 2K description: >- Output quality tier. 1K and 1.5K cost the same; 2K costs more. Defaults to 2K. image_list: type: array items: type: object properties: url: type: string format: uri required: - url description: >- Optional reference images for image-to-image or editing, [{"url": "https://..."}]. Up to 10 images, each up to 30MB. Each reference image adds an input fee. minItems: 1 maxItems: 10 background: type: string enum: - opaque - transparent - auto default: opaque description: >- `opaque` (default) gives a solid background. `transparent` gives a real alpha channel, with or without input images. `auto` lets the model decide, and the result reports `background` as `transparent` or `opaque`. `transparent` and `auto` output png; combining them with `output_format: jpeg` is rejected. output_format: type: string enum: - png - jpeg default: jpeg description: >- Output file format. Defaults to png when `background` is `transparent` or `auto`. custom_callback_url: type: string format: uri description: >- Optional. A publicly accessible HTTPS URL. When the task status changes (processing / success / failed), GoEnhance sends a POST request to this URL. The request body is identical to the response of GET /api/v1/jobs/detail. If your server does not respond with HTTP 200, the notification is retried up to 3 times, with a 3-second timeout per attempt. example: https://your-server.com/goenhance/callback required: - model - prompt example: model: seedream-5-5 prompt: A glass perfume bottle on a marble table, soft studio light image_size: 2K ratio: '4:5' responses: '200': description: '' content: application/json: schema: type: object properties: code: type: integer msg: type: string data: type: object properties: img_uuid: type: string cost: type: number description: >- Tokens deducted for this request. This is the amount actually charged, so it already reflects any discount active on your account and can be lower than the listed price. Tokens are deducted when the task is accepted, and refunded automatically if the generation ends in failure. example: 1.82 required: - img_uuid - cost required: - code - msg - data examples: '1': summary: Success value: code: 0 msg: Success data: img_uuid: c12b656c-747a-44fd-9c80-add79b0c52d5 cost: 1.82 '2': summary: Insufficient tokens value: code: 100 msg: tokens is not enough quota: summary: API key quota exceeded value: code: 101 msg: 'API key quota exceeded: 4990 of 5000 tokens used (monthly)' headers: {} '401': description: '' content: application/json: schema: type: object properties: code: type: integer msg: type: string required: - code - msg headers: {} deprecated: false security: [] ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.