> ## Documentation Index > Fetch the complete documentation index at: https://docs.bibigpt.co/llms.txt > Use this file to discover all available pages before exploring further. # Generate or edit an image with AI (chatimg.ai) > Transform a source image with an AI model and prompt (e.g. style transfer, editing). Requires an API token (Authorization: Bearer ). Billing: charged from your chatimg.ai credits per image — openai: 25 credits, gpt-image-2: 50 credits, flux: 12 credits, gemini: 10 credits, nanobanana-pro: 30 credits, nanobanana-2-lite: 12 credits, nanobanana-2: 20 credits, grok: 30 credits, seedream: 15 credits, qwen: 8 credits, z-image-turbo: 5 credits, flux-2-flex: 25 credits. See GET /v1/imagePricing for machine-readable pricing. Generation is asynchronous: poll GET /v1/imageStatus with the same imageUrl until status is completed. Failed generations are automatically refunded. ## OpenAPI ````yaml https://api.bibigpt.co/api/openapi.json post /v1/generateImage openapi: 3.1.0 info: title: BibiGPT OpenAPI 规范 description: 音视频 AI 学习助理的开放 API，加速音视频内容的信息提取，借助 AI 直接采取行动。 version: 1.1.0 servers: - url: https://api.bibigpt.co/api security: [] externalDocs: url: https://docs.bibigpt.co/api paths: /v1/generateImage: post: tags: - open summary: Generate or edit an image with AI (chatimg.ai) description: >- Transform a source image with an AI model and prompt (e.g. style transfer, editing). Requires an API token (Authorization: Bearer ). Billing: charged from your chatimg.ai credits per image — openai: 25 credits, gpt-image-2: 50 credits, flux: 12 credits, gemini: 10 credits, nanobanana-pro: 30 credits, nanobanana-2-lite: 12 credits, nanobanana-2: 20 credits, grok: 30 credits, seedream: 15 credits, qwen: 8 credits, z-image-turbo: 5 credits, flux-2-flex: 25 credits. See GET /v1/imagePricing for machine-readable pricing. Generation is asynchronous: poll GET /v1/imageStatus with the same imageUrl until status is completed. Failed generations are automatically refunded. operationId: generateImage parameters: [] requestBody: required: true content: application/json: schema: type: object properties: imageUrl: type: string minLength: 1 description: >- URL of the source image to process. Supports http URLs and base64 encoded images (with or without data:image/... prefix) prompt: description: >- Prompt describing the desired transformation (default: ghibli style) type: string model: default: nanobanana-2-lite description: >- AI model to use (default: nanobanana-2-lite). Pricing per image: openai: 25 credits, gpt-image-2: 50 credits, flux: 12 credits, gemini: 10 credits, nanobanana-pro: 30 credits, nanobanana-2-lite: 12 credits, nanobanana-2: 20 credits, grok: 30 credits, seedream: 15 credits, qwen: 8 credits, z-image-turbo: 5 credits, flux-2-flex: 25 credits type: string enum: - openai - gpt-image-2 - flux - gemini - nanobanana-pro - nanobanana-2-lite - nanobanana-2 - grok - seedream - qwen - z-image-turbo - flux-2-flex required: - imageUrl responses: '200': description: Successful response content: application/json: schema: type: object properties: taskId: type: string description: Unique identifier for the generation task status: type: string enum: - pending - completed - error - unknown description: Initial status of the generation task (pending) imageUrl: type: string description: >- The source image URL, used as the key when polling /v1/imageStatus timestamp: type: number description: Timestamp when the task was created costCredits: type: number description: Credits charged for this generation balanceRemaining: type: number description: Remaining credits balance after this charge required: - taskId - status - imageUrl - timestamp - costCredits - balanceRemaining additionalProperties: false '400': description: Invalid input data content: application/json: schema: $ref: '#/components/schemas/error.BAD_REQUEST' '401': description: Authorization not provided content: application/json: schema: $ref: '#/components/schemas/error.UNAUTHORIZED' '403': description: Insufficient access content: application/json: schema: $ref: '#/components/schemas/error.FORBIDDEN' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/error.INTERNAL_SERVER_ERROR' security: - Authorization: [] components: schemas: error.BAD_REQUEST: type: object properties: message: type: string description: The error message example: Invalid input data code: type: string description: The error code example: BAD_REQUEST issues: description: An array of issues that were responsible for the error example: [] type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false title: Invalid input data error (400) description: The error information example: code: BAD_REQUEST message: Invalid input data issues: [] error.UNAUTHORIZED: type: object properties: message: type: string description: The error message example: Authorization not provided code: type: string description: The error code example: UNAUTHORIZED issues: description: An array of issues that were responsible for the error example: [] type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false title: Authorization not provided error (401) description: The error information example: code: UNAUTHORIZED message: Authorization not provided issues: [] error.FORBIDDEN: type: object properties: message: type: string description: The error message example: Insufficient access code: type: string description: The error code example: FORBIDDEN issues: description: An array of issues that were responsible for the error example: [] type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false title: Insufficient access error (403) description: The error information example: code: FORBIDDEN message: Insufficient access issues: [] error.INTERNAL_SERVER_ERROR: type: object properties: message: type: string description: The error message example: Internal server error code: type: string description: The error code example: INTERNAL_SERVER_ERROR issues: description: An array of issues that were responsible for the error example: [] type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false title: Internal server error error (500) description: The error information example: code: INTERNAL_SERVER_ERROR message: Internal server error issues: [] securitySchemes: Authorization: type: http scheme: bearer ````