> ## Documentation Index > Fetch the complete documentation index at: https://docs.evolink.ai/llms.txt > Use this file to discover all available pages before exploring further. # Wan2.5 Text to Video > - WAN2.5 (wan2.5-text-to-video) model supports text-to-video mode - Asynchronous processing mode, use the returned task ID to [query](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml /en/api-manual/video-series/wan2.5/wan2.5-text-to-video.json POST /v1/videos/generations openapi: 3.1.0 info: title: wan2.5-text-to-video Interface description: >- Use WAN2.5 model for text-to-video generation, supporting simplified model parameter configuration license: name: MIT version: 1.0.0 servers: - url: https://api.evolink.ai description: Production environment security: - bearerAuth: [] paths: /v1/videos/generations: post: tags: - Video Generation summary: wan2.5-text-to-video Interface description: >- - WAN2.5 (wan2.5-text-to-video) model supports text-to-video mode - Asynchronous processing mode, use the returned task ID to [query](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly operationId: createWan25TextToVideoGeneration requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/Wan25TextToVideoRequest' examples: text_to_video: summary: Text to Video value: model: wan2.5-text-to-video prompt: A cat playing piano responses: '200': description: Video task created successfully content: application/json: schema: $ref: '#/components/schemas/VideoGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: invalid_request message: Invalid request parameters type: invalid_request_error '401': description: Unauthenticated, invalid or expired token content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, recharge required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: insufficient_quota message: Insufficient quota. Please top up your account. type: insufficient_quota '403': description: Access denied content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: model_access_denied message: 'Token does not have access to model: wan2.5-text-to-video' type: invalid_request_error '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: rate_limit_exceeded message: Too many requests, please try again later type: rate_limit_error '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: internal_error message: Internal server error type: api_error components: schemas: Wan25TextToVideoRequest: type: object required: - model - prompt properties: model: type: string description: Model name enum: - wan2.5-text-to-video default: wan2.5-text-to-video example: wan2.5-text-to-video prompt: type: string description: >- Prompt describing what kind of video to generate, limited to 2000 tokens example: A cat playing the piano maxLength: 2000 aspect_ratio: type: string description: >- Video aspect ratio, defaults to `16:9` **Description:** - `480p`: Supports `16:9` (landscape), `9:16` (portrait), `1:1` (square) - `720p`: Supports `16:9` (landscape), `9:16` (portrait), `1:1` (square), `4:3`, `3:4` - `1080p`: Supports `16:9` (landscape), `9:16` (portrait), `1:1` (square), `4:3`, `3:4` default: '16:9' example: '16:9' quality: type: string description: >- Video quality, defaults to `720p` **Description:** - `480p`: Lower quality, lower price - `720p`: Standard quality, standard price, this is the default - `1080p`: High quality, higher price **Note:** Different quality levels support different aspect ratios, see `aspect_ratio` parameter for details default: 720p example: 720p duration: type: integer description: >- Specifies the duration of the generated video (seconds) **Note:** - Only supports values `5` and `10`, representing `5 seconds` and `10 seconds` respectively - A single request will pre-charge based on the value of `duration`, with actual charges based on the generated video duration in seconds example: 5 prompt_extend: type: boolean description: >- Whether to enable intelligent prompt rewriting. When enabled, a large language model will optimize the prompt. This is particularly effective for prompts that lack detail or are too simple. Default value is `true` default: true example: true callback_url: type: string description: >- HTTPS callback address after task completion **Callback Timing:** - Triggered when task is completed, failed, or cancelled - Sent after billing confirmation is completed **Security Restrictions:** - Only HTTPS protocol is supported - Callback to internal IP addresses is prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.) - URL length must not exceed `2048` characters **Callback Mechanism:** - Timeout: `10` seconds - Maximum `3` retries on failure (retries after `1` second/`2` seconds/`4` seconds) - Callback response body format is consistent with the task query API response format - Callback address returning 2xx status code is considered successful, other status codes will trigger retry format: uri example: https://your-domain.com/webhooks/video-task-completed VideoGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1757169743 id: type: string description: Task ID example: task-unified-1757169743-7cvnl5zw model: type: string description: Actual model name used example: wan2.5-text-to-video object: type: string enum: - video.generation.task description: Specific task type progress: type: integer description: Task progress percentage (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_info: $ref: '#/components/schemas/VideoTaskInfo' description: Video task detailed information type: type: string enum: - text - image - audio - video description: Task output type example: video usage: $ref: '#/components/schemas/Usage' description: Usage and billing information ErrorResponse: type: object properties: error: type: object properties: code: type: string description: Error code identifier message: type: string description: Error description type: type: string description: Error type VideoTaskInfo: type: object properties: can_cancel: type: boolean description: Whether the task can be cancelled example: true estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 120 Usage: type: object description: Usage and billing information properties: billing_rule: type: string description: Billing rule enum: - per_call - per_token - per_second example: per_call credits_reserved: type: number description: Estimated credits consumed minimum: 0 example: 5 user_group: type: string description: User group category enum: - default - vip example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ##All APIs require Bearer Token authentication## **Get API Key:** Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to get your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ````