Veo 3.1

Generate fixed 8-second videos with selectable Quality, Fast, or Lite tiers and 720p, 1080p, or 4K output. Text and frame generation default to Quality at 720p; reference images require Fast or Lite. ### Supported modes | Mode | Required input | Rules | | --- | --- | --- | | Quality | `model`, `prompt` | Set `quality=Quality` and optional `resolution` (`720p`, `1080p`, or `4k`). | | Fast | `model`, `prompt` | Set `quality=Fast` and optional `resolution` (`720p`, `1080p`, or `4k`). | | Lite | `model`, `prompt` | Set `quality=Lite` and optional `resolution` (`720p`, `1080p`, or `4k`). | | First and last frames | `model`, `prompt`, `images` | Provide one first-frame URL or two URLs in first-to-last order. | | Reference images | `model`, `prompt`, `reference_images` | Provide 1–3 URLs, use Fast or Lite, and do not combine with `images`. | **Async flow:** Create the task, save `data.id`, then [poll the Task](/quick-guide#get-task-status) with `GET /v1/tasks/{task_id}`. On `succeeded`, read `data.output.media`. On `failed`, read `data.error_code` and `data.error_message`, then follow the [error and retry policy](/quick-guide#errors-and-retry-policy). **Using a local file?** [upload a local input](/quick-guide#upload-an-input-file) first and pass the returned `data.url`.