> ## 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. # Hailuo 2.3 Fast I2V > [Core Function] Hailuo 2.3 Fast I2V is a high-speed, cost-effective image-to-video generation model. [Strengths] It excels at generating videos from images much faster and at roughly 50% lower cost than the standard 2.3 model, while still maintaining the 2.3 architecture's strength in human motion. [Best For] Highly recommended for: rapid prototyping, batch social media creation, and cost-sensitive video generation pipelines. [Limitations] Do NOT use this model for text-to-video (it only accepts image inputs). Do NOT use when absolute maximum visual fidelity is the primary requirement. [Routing] Choose this model when the user emphasizes 'fast', 'quick', or 'cost-effective' image-to-video generation. For maximum quality, use the standard Hailuo 2.3 I2V. ## OpenAPI ````yaml /model-api/minimax/minimax-i2v.json post /minimax/hailuo-2.3-fast-i2v openapi: 3.1.0 info: description: The image-to-video models API from MiniMax. version: 1.0.0 contact: name: Modellix Support email: support@modellix.ai title: MiniMax Image-to-Video Models API servers: - url: https://api.modellix.ai/api/v1 description: The image-to-video models API from MiniMax. security: - bearerAuth: [] paths: /minimax/hailuo-2.3-fast-i2v: post: summary: Hailuo 2.3 Fast I2V description: >- [Core Function] Hailuo 2.3 Fast I2V is a high-speed, cost-effective image-to-video generation model. [Strengths] It excels at generating videos from images much faster and at roughly 50% lower cost than the standard 2.3 model, while still maintaining the 2.3 architecture's strength in human motion. [Best For] Highly recommended for: rapid prototyping, batch social media creation, and cost-sensitive video generation pipelines. [Limitations] Do NOT use this model for text-to-video (it only accepts image inputs). Do NOT use when absolute maximum visual fidelity is the primary requirement. [Routing] Choose this model when the user emphasizes 'fast', 'quick', or 'cost-effective' image-to-video generation. For maximum quality, use the standard Hailuo 2.3 I2V. operationId: minimaxHailuo23FastI2VAsync requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/MinimaxHailuo23FastI2VRequest' examples: basic: summary: Quick video generation value: first_frame_image: https://example.com/image.jpg prompt: Quick animation test fast_pretreatment: true responses: '200': description: Task submitted successfully content: application/json: schema: $ref: '#/components/schemas/AsyncTaskResponse' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: MinimaxHailuo23FastI2VRequest: type: object required: - first_frame_image properties: prompt: type: string description: Video content description, supports camera control instructions minLength: 1 maxLength: 2000 example: Quick animation test first_frame_image: type: string description: First frame image URL or Base64 Data URL minLength: 1 example: https://example.com/image.jpg prompt_optimizer: type: boolean description: Enable automatic prompt optimization default: true example: true fast_pretreatment: type: boolean description: Fast pretreatment mode (only effective when prompt_optimizer=true) default: false example: false duration: type: integer description: Video duration in seconds default: 6 enum: - 6 - 10 example: 6 resolution: type: string description: Video resolution default: 768P enum: - 768P - 1080P example: 768P 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 example: task-abc123 model_id: type: string description: Model ID example: model-123 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 ''first_frame_image'' is required' responses: BadRequest: description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: missing_first_frame: summary: Missing required first_frame_image value: code: 400 message: 'Invalid parameters: parameter ''first_frame_image'' is required' invalid_duration: summary: Invalid duration value value: code: 400 message: 'Invalid parameters: duration must be one of [6, 10]' invalid_resolution: summary: Invalid resolution for duration value: code: 400 message: >- Invalid parameters: 10 seconds duration only supports 768P resolution invalid_image: summary: Invalid image format or size value: code: 400 message: >- Invalid parameters: image size exceeds 20MB or format not supported 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`.' ````