> ## 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. # Grok Imagine Video 1.5 Lite > [Core Function] Grok Imagine Video 1.5 Lite generates a short video with native audio from a text prompt. [Strengths] It produces lip-synced speech at the lowest price in the Grok Imagine video family, with controllable duration, aspect ratio, and resolution. [Best For] Highly recommended for: simple social clips, animated concepts, and text-only drafts that do not need reference images or pinned frames. [Limitations] Do NOT use this model when a starting image is provided, or for reference images, voice references, first or last frames, keyframes, video editing, or video extension. Duration is 1-15 seconds and resolution is 480p, 720p, or 1080p. 1080p is upscaled from 720p, not native 1080p. [Routing] Use this model for text-only video on the Lite backbone. If the user provides one starting image, use Grok Imagine Video 1.5 Lite I2V. If the user needs reference images, voices, pinned frames, or native 1080p, use the full Grok Imagine Video 1.5 models. ## OpenAPI ````yaml /media-model-api/xai/xai-t2v.json post /xai/grok-imagine-video-1.5-lite openapi: 3.1.0 info: description: >- The text-to-video models API from xAI Grok Imagine. Generates a video from a text prompt. Tasks are asynchronous: submit, then poll the task endpoint for the result. version: 1.0.0 contact: name: Modellix Support email: support@modellix.ai title: xAI Grok Imagine Text-to-Video Models API servers: - url: https://api.modellix.ai/api/v1 description: The text-to-video models API from xAI Grok Imagine. security: - bearerAuth: [] paths: /xai/grok-imagine-video-1.5-lite: post: summary: Grok Imagine Video 1.5 Lite description: >- [Core Function] Grok Imagine Video 1.5 Lite generates a short video with native audio from a text prompt. [Strengths] It produces lip-synced speech at the lowest price in the Grok Imagine video family, with controllable duration, aspect ratio, and resolution. [Best For] Highly recommended for: simple social clips, animated concepts, and text-only drafts that do not need reference images or pinned frames. [Limitations] Do NOT use this model when a starting image is provided, or for reference images, voice references, first or last frames, keyframes, video editing, or video extension. Duration is 1-15 seconds and resolution is 480p, 720p, or 1080p. 1080p is upscaled from 720p, not native 1080p. [Routing] Use this model for text-only video on the Lite backbone. If the user provides one starting image, use Grok Imagine Video 1.5 Lite I2V. If the user needs reference images, voices, pinned frames, or native 1080p, use the full Grok Imagine Video 1.5 models. operationId: grokImagineVideo15LiteAsync requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/GrokImagineVideo15LiteRequest' examples: basic: summary: Prompt only value: prompt: A paper boat drifting across a puddle full_options: summary: Full options value: prompt: A paper boat drifting across a puddle duration: 8 aspect_ratio: '21:9' resolution: 480p 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-xai-t2v-lite-001 model_id: xai/grok-imagine-video-1.5-lite get_result: method: GET url: https://api.modellix.ai/api/v1/tasks/task-xai-t2v-lite-001 '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: GrokImagineVideo15LiteRequest: type: object required: - prompt description: >- xAI Grok Imagine Video 1.5 Lite text-to-video request. Duration is 1-15 seconds. 1080p is upscaled from 720p. properties: prompt: type: string minLength: 1 description: Text description of the video to generate example: A paper boat drifting across a puddle duration: type: integer minimum: 1 maximum: 15 default: 8 description: Video duration in seconds example: 8 aspect_ratio: type: string enum: - '1:1' - '16:9' - '9:16' - '4:3' - '3:4' - '3:2' - '2:3' - '21:9' - '5:2' default: '16:9' description: Video aspect ratio example: '16:9' resolution: type: string enum: - 480p - 720p - 1080p default: 480p description: Video resolution. 1080p is upscaled from 720p example: 480p 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: xai/grok-imagine-video get_result: type: object description: API information to query the task result properties: method: type: string example: GET url: type: string 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 example: 400 message: type: string 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`.' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.