> ## Documentation Index > Fetch the complete documentation index at: https://docs.linkmodel.ai/llms.txt > Use this file to discover all available pages before exploring further. # gemini-nano-banana-2.1 > Google's efficient image generation and conversational editing model with 1K–4K output, multi-image fusion, character consistency, accurate text, and search grounding. ## OpenAPI ````yaml /openapi/image/gemini-nano-banana-2-1.yaml post /images/generations openapi: 3.0.3 info: title: gemini-nano-banana-2.1 version: 1.0.0 description: >- Google's efficient image generation and conversational editing model with 1K–4K output, multi-image fusion, character consistency, accurate text, and search grounding. x-linkmodel-sort-weight: 99202610069 servers: - url: https://api.linkmodel.ai/v1 description: Production security: - bearerAuth: [] tags: - name: Google - name: image paths: /images/generations: post: tags: - Google - image summary: gemini-nano-banana-2.1 description: > Google's efficient image generation and conversational editing model with 1K–4K output, multi-image fusion, character consistency, accurate text, and search grounding. | | | | --- | --- | | **Provider** | Google | | **Tasks** | text-to-image · image-to-image | | **Starting from** | 0.1125 USD / token · Pricing details | ## Task lifecycle This endpoint creates an asynchronous task. Poll `GET /images/generations/{task_id}` with the returned `task_id` until the task reaches a terminal state. If the POST request times out or its result is uncertain, do not blindly retry it. The original request may already have created another task and billing order. Completed asset URLs are dynamically signed. Download or copy assets that must be retained instead of treating the URLs as permanent identifiers. operationId: gemini-nano-banana-2-1 requestBody: required: true content: application/json: schema: type: object properties: model: type: string enum: - gemini-nano-banana-2.1 description: 'Must be one of: gemini-nano-banana-2.1.' prompt: type: string minLength: 1 description: Length must be at least 1. images: type: array maxItems: 14 items: type: string description: Maximum 14 items. image_is_base64: type: array maxItems: 14 items: type: boolean enum: - false - true description: One flag per reference image; omit for URLs. size: type: string enum: - '16:9' - 16x9 - '1:1' - '1:4' - '1:8' - 1x1 - 1x4 - 1x8 - '21:9' - 21x9 - '2:3' - 2x3 - '3:2' - '3:4' - 3x2 - 3x4 - '4:1' - '4:3' - '4:5' - 4x1 - 4x3 - 4x5 - '5:4' - 5x4 - '8:1' - 8x1 - '9:16' - '9:21' - 9x16 - 9x21 description: >- The five additional ratios require the updated Vertex provider. quality: type: string enum: - 1K - 2K - 4K default: 1K description: >- Resolution affects upstream token usage; billing remains per token. Defaults to `1K`. max_images: type: integer default: 1 minimum: 1 maximum: 1 description: Must be between 1 and 1. Defaults to `1`. output_format: type: string enum: - jpeg - png description: 'Must be one of: jpeg, png.' output_compression: type: integer minimum: 0 maximum: 100 description: >- Use with output_format=jpeg; PNG does not accept compression. extends.response_modalities: type: array minItems: 1 maxItems: 2 items: type: string enum: - IMAGE - TEXT description: >- Requires updated code. Use [IMAGE] or [TEXT,IMAGE]; image tasks require IMAGE. extends.thinking_level: type: string enum: - HIGH - MEDIUM - MINIMAL description: >- Requires updated code. Omit to retain upstream default; LOW is unsupported. videos: type: array maxItems: 10 items: type: string description: >- 可选视频 URL 字符串数组；HTTPS/gs URI，最多 10 个，最多一个 YouTube 链接。按 URL 路径后缀推断 MIME；无后缀链接请使用旧 extends 视频格式显式指定 MIME。不可与旧视频字段混用。. extends.video_url: type: string description: >- Requires updated code. HTTPS or gs URI; omitted video_mime_type defaults to video/mp4. extends.video_mime_type: type: string enum: - video/3gpp - video/avi - video/mp4 - video/mpeg - video/mpg - video/quicktime - video/webm - video/wmv - video/x-flv description: Requires updated code; only used with extends.video_url. extends.videos: type: array maxItems: 10 items: type: string description: >- Requires updated code. Each item: {url,mime_type}; at most one YouTube video. Item and URL safety validation is enforced by code. required: - model responses: '200': description: >- Business response. `code=0` means the task was accepted; validation failures can return HTTP 200 with `code=400`. content: application/json: schema: oneOf: - type: object required: - code - data - msg properties: code: type: integer enum: - 0 example: 0 data: type: object required: - task_id properties: task_id: type: string description: Use this id to poll task status. example: aurora_abc123 order_id: type: string description: Billing order id. example: 019da9cf-d1db-78e1-ac23-526774d01193 status: type: string example: Processing price: type: number description: Charged amount in the model's pricing currency. example: 0.074 msg: type: string example: success request_id: type: string format: uuid example: 250b66dd-e1fb-4bb6-b5f6-c668efadc35d - type: object required: - code - msg properties: code: type: integer enum: - 400 example: 400 data: type: object example: {} msg: type: string example: model is required request_id: type: string format: uuid example: 96be7a7d-3e81-4916-a6b8-19b32773a693 '400': description: >- Malformed HTTP request rejected by the Gateway. Model and parameter validation may instead use HTTP 200 with business `code=400`. content: application/json: schema: type: object properties: code: type: integer example: 400 msg: type: string example: task_id is required request_id: type: string format: uuid example: 96be7a7d-3e81-4916-a6b8-19b32773a693 '401': description: Unauthorized — missing or invalid API key. content: application/json: schema: type: object properties: code: type: integer example: 401 data: type: object example: {} msg: type: string example: invalid api key request_id: type: string format: uuid example: bff4c295-c7da-4507-9708-4627cb6373ba '500': description: Internal error — task creation failed (e.g. insufficient balance). content: application/json: schema: type: object properties: code: type: integer example: 500 msg: type: string example: >- create task failed: billing: code=100601: insufficient balance request_id: type: string format: uuid example: 3409f6fb-fa9a-4534-b530-195b5f6f4e32 components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.