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API ReferenceLegacy Video Generation

Generate video from text

Deprecated

Deprecated: After October 26, 2026 at 11:59 PM UTC, requests to this endpoint will no longer work. See Migrate from V1 to V2.

Generate a video from a text prompt. Describe the scene, camera motion, and mood — the model returns a video with matching audio.

Returns the generated video directly in the response. For an asynchronous version that returns a job to poll, see v2/text-to-video.

Billed per second of generated video. See Pricing.

Authentication

AuthorizationBearer
API key authentication

Request

This endpoint expects an object.
promptstringRequired<=5000 characters
Text prompt describing the desired video content
modelenumRequired

Model to use for generation. See Supported Models for details.

Allowed values:
durationinteger or nullRequired

Video duration in seconds. See Supported Models for available durations per model. Pass null to let ltx-2-5-fast or ltx-2-5-pro choose the length from your prompt — see Automatic duration.

resolutionstringRequired

Output video resolution. See Supported Models for available resolutions per model.

fpsintegerOptionalDefaults to 24

Frame rate in frames per second. See Supported Models for available FPS per model and resolution.

generate_audiobooleanOptionalDefaults to true

Generate audio for the video. When true, the generated video will include AI-generated audio matching the scene. When false, only silent video is generated.

camera_motionenumOptional
Apply camera motion effects to the generated video.

Response headers

x-request-idstringOptional
Unique request identifier for tracking and debugging
Content-TypestringOptional
The MIME type of the video file
Content-Lengthinteger
The size of the video file in bytes

Response

Video generated successfully

Errors

400
Bad Request Error
401
Unauthorized Error
422
Unprocessable Entity Error
429
Too Many Requests Error
500
Internal Server Error
503
Service Unavailable Error
504
Gateway Timeout Error