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Veo 3.1 Lite query video (Gemini)

GET 
/v1beta/models/veo-3.1-lite/operations/:operation_id

Poll the Veo 3.1 Lite operation until done is true. Use the last segment of the submit response name as operation_id.

Example:

GET /v1beta/models/veo-3.1-lite/operations/task_xxxxxxxx

Vertex-style fetch is also accepted:

POST /v1beta/models/veo-3.1-lite:fetchPredictOperation
Content-Type: application/json

{
  "operationName": "models/veo-3.1-lite/operations/task_xxxxxxxx"
}

In progress: { "name": "...", "done": false }.

On success, generatedVideos and generatedSamples are both returned so official REST and the google-genai SDK can consume the result.

After done: true, download uri with the same system token. uri points to this system's /v1/videos/{id}/content, not a Google file URL.

curl --location 'https://open-api.fancyai.com/v1beta/models/veo-3.1-lite/operations/task_xxxxxxxx' \
  --header 'x-goog-api-key: YOUR_API_KEY'

Download​

curl -L 'https://open-api.fancyai.com/v1/videos/task_xxxxxxxx/content' \
  --header 'x-goog-api-key: YOUR_API_KEY' \
  --output veo.mp4

After download, the actual file size should match the Content-Length response header. If it is smaller, the download was interrupted and the file may not play.

Request​

Responses​

Query succeeded