> ## 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. # Imagen 4.0 > [Core Function] Imagen 4.0 is Google's flagship professional-grade text-to-image model designed for high-fidelity visual generation. [Strengths] It excels at industry-leading photorealism, exceptional typography/text rendering inside images, and strong prompt adherence, supporting up to 2K resolution and batch generation. [Best For] Highly recommended for general high-quality image generation, marketing assets (posters, product labels, menus, signage), and product photography mockups where readable text is required. [Limitations] Do NOT use this model if you need instant/real-time generation, native image editing (inpainting/outpainting), or negative prompts. It is strictly an image-only output model. [Routing] Use this model by default for high-quality, photorealistic text-to-image requests. If the user emphasizes speed or needs lower cost, route to Imagen 4.0 Fast. If the user demands the absolute highest detail and prompt precision, route to Imagen 4.0 Ultra. ## OpenAPI ````yaml /model-api/google/google-t2i.json post /google/imagen-4.0-generate-001 openapi: 3.1.0 info: description: The text-to-image models API from Google (Gemini and Imagen series). version: 1.0.0 contact: name: Modellix Support email: support@modellix.ai title: Google Text-to-Image Models API servers: - url: https://api.modellix.ai/api/v1 description: The text-to-image models API from Google. security: - bearerAuth: [] paths: /google/imagen-4.0-generate-001: post: summary: Imagen 4.0 description: >- [Core Function] Imagen 4.0 is Google's flagship professional-grade text-to-image model designed for high-fidelity visual generation. [Strengths] It excels at industry-leading photorealism, exceptional typography/text rendering inside images, and strong prompt adherence, supporting up to 2K resolution and batch generation. [Best For] Highly recommended for general high-quality image generation, marketing assets (posters, product labels, menus, signage), and product photography mockups where readable text is required. [Limitations] Do NOT use this model if you need instant/real-time generation, native image editing (inpainting/outpainting), or negative prompts. It is strictly an image-only output model. [Routing] Use this model by default for high-quality, photorealistic text-to-image requests. If the user emphasizes speed or needs lower cost, route to Imagen 4.0 Fast. If the user demands the absolute highest detail and prompt precision, route to Imagen 4.0 Ultra. operationId: imagen40Generate001Async requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ImagenStandardUltraRequest' examples: basic: summary: Basic image generation value: prompt: A golden retriever playing fetch on the beach at sunset batch: summary: Batch generation with all options value: prompt: Professional product photography of a luxury watch on marble sampleCount: 4 aspectRatio: '1:1' personGeneration: dont_allow imageSize: 2K responses: '200': description: Task submitted successfully content: application/json: schema: $ref: '#/components/schemas/AsyncTaskResponse' example: code: 0 message: success data: status: pending task_id: task-jkl012 model_id: google/imagen-4.0-generate-001 get_result: method: GET url: https://api.modellix.ai/api/v1/tasks/task-jkl012 '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: ImagenStandardUltraRequest: type: object required: - prompt properties: prompt: type: string description: Image description text minLength: 1 example: A golden retriever playing fetch on the beach at sunset sampleCount: type: integer description: Number of images to generate per request default: 1 minimum: 1 maximum: 4 example: 1 aspectRatio: type: string description: Image aspect ratio default: '1:1' enum: - '1:1' - '3:4' - '4:3' - '9:16' - '16:9' example: '16:9' personGeneration: type: string description: Person generation policy default: allow_all enum: - dont_allow - allow_adult - allow_all example: allow_all imageSize: type: string description: Output image resolution enum: - 1K - 2K example: 1K AsyncTaskResponse: 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: type: object required: - status - task_id - model_id properties: status: type: string enum: - pending - processing description: Task status example: pending task_id: type: string description: Unique task identifier for polling example: task-abc123 model_id: type: string description: Model ID in `provider/model` format example: google/nano-banana get_result: type: object description: API information to query the task result properties: method: type: string description: HTTP method example: GET url: type: string description: Full URL to query the task result example: https://api.modellix.ai/api/v1/tasks/task-abc123 description: Detailed data about the submitted asynchronous task. ErrorResponse: type: object required: - code - message properties: code: type: integer description: Error code (equals HTTP status code) example: 400 message: type: string description: 'Error message in format ''Category: detail''' example: 'Invalid parameters: parameter ''prompt'' is required' responses: BadRequest: description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 400 message: 'Invalid parameters: parameter ''prompt'' is required' Unauthorized: description: Unauthorized - Invalid or missing API Key content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 401 message: 'Authentication failed: invalid API key' TooManyRequests: description: Too many requests - Rate limit exceeded headers: X-RateLimit-Limit: description: Maximum requests per minute schema: type: integer example: 100 X-RateLimit-Remaining: description: Remaining quota in current window schema: type: integer example: 0 X-RateLimit-Reset: description: Rate limit window reset time (Unix timestamp) schema: type: integer example: 1704067260 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 429 message: >- Rate limit exceeded: 100 requests per minute, retry after 60 seconds InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 500 message: Internal server error securitySchemes: bearerAuth: type: http scheme: bearer description: 'API Key authentication. Format: `Bearer YOUR_API_KEY`.' ````