Video

Veo 3.1 Extend

Veo 3.1 Extend API continues a completed Veo 3.1 task with a new prompt, giving teams a practical way to branch or lengthen generated scenes.

Video continuationFast / quality modesExisting Veo taskIdOptional watermark + seed

Loading workspace...

Endpoints

POSThttps://api.apixo.ai/api/v1/generateTask/veo-3-1-extendCreate task

GEThttps://api.apixo.ai/api/v1/statusTask/veo-3-1-extend?taskId={taskId}Poll status

Authentication

Checking API access...

Sign in to claim free credits, test the Playground, and continue into API integration.

Request body

request_type

async

Use callback with callback_url for webhooks.

provider

official

Matches the Seedance 2.0 manual.

input

object

Mode, prompt, references, size, duration, and audio settings.

Parameters

request_typerequired

Typeselect

Use async to poll statusTask, or callback to receive a webhook when the result is ready.async · callback

callback_urlconditional

Typetext

Public HTTPS URL for callback delivery.Only in request_type=callback

taskIdrequired

Typetext

Use the data.taskId returned by a previous /generateTask/veo-3-1 request.

moderequired

Typeselect

Choose fast for lower cost or quality for higher fidelity.fast · quality

promptrequired

Typestring

Describe how the existing Veo 3.1 video should continue.

watermarkoptional

Typetext

Optional watermark text for the extended video.

seedoptional

Typetext

Optional random seed. Omit this field if you do not need seed control.

Parameter	Type	Required	Description
`request_type`	select	required	Use async to poll statusTask, or callback to receive a webhook when the result is ready.async · callback
`callback_url`	text	conditional	Public HTTPS URL for callback delivery.Only in request_type=callback
`taskId`	text	required	Use the data.taskId returned by a previous /generateTask/veo-3-1 request.
`mode`	select	required	Choose fast for lower cost or quality for higher fidelity.fast · quality
`prompt`	string	required	Describe how the existing Veo 3.1 video should continue.
`watermark`	text	optional	Optional watermark text for the extended video.
`seed`	text	optional	Optional random seed. Omit this field if you do not need seed control.

Example (cURL)

curl -X POST "https://api.apixo.ai/api/v1/generateTask/veo-3-1-extend" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "taskId": "task_id_from_previous_veo_3_1_generation",
      "mode": "fast",
      "prompt": "continue this scene with a smooth camera move and richer visual rhythm"
    }
  }'

Full API documentation

Veo 3.1 Extend API Guide

Veo 3.1 Extend API for video generation workflows

Use Veo 3.1 Extend through APIXO to test prompts in the Playground, inspect demos, compare pricing, and move the same settings into production API calls.

Veo 3.1 Extend workflow

Build and ship Veo 3.1 Extend API workflows from one page

This Veo 3.1 Extend landing page is designed for teams that want to evaluate output quality, compare pricing, create API keys, and hand tested settings into production code from the same workflow.

Veo 3.1 Extend prompt testing

Use the Veo 3.1 Extend playground to test prompts, mode choices, and output settings before moving a request into production.

Veo 3.1 Extend demo review

Inspect real or placeholder video outputs first, then load the same demo parameters into the Playground for faster iteration.

Veo 3.1 Extend API handoff

Move from visual testing to API keys, cURL examples, request JSON, and documentation without leaving this model page.

Veo 3.1 Extend pricing clarity

Compare available pricing tiers on the same page before choosing a cost profile for production jobs.

Veo 3.1 Extend input control

Adjust image, video, or motion references directly in the Playground so the tested form matches the documented API surface.

Veo 3.1 Extend production readiness

Use APIXO when async polling, callback delivery, generation history, and predictable billing matter for team workflows.

Model Overview

What is the Veo 3.1 Extend API?

Veo 3.1 Extend is available through APIXO as a production API for video generation. The model page combines playground testing, real request parameters, pricing, and documentation handoff in one workflow.

Use this page to validate prompts and mode choices first, then keep the same settings for API keys, cURL examples, backend integration, and repeatable generation jobs.

Veo 3.1 Extend API workflow for production teams

Start with the Playground and choose the mode that matches your input assets.
Review example outputs and load demo parameters when you need a quick baseline.
Check pricing before sending large batches or higher-resolution jobs.
Use async polling for interactive UX or callback mode for backend queues.

Veo 3.1 Extend API Technical Specs

Current Veo 3.1 Extend API capabilities and integration-relevant constraints.

Veo 3.1 Extend Modes

Video-to-video continuation from an existing Veo 3.1 task

Veo 3.1 Extend Output

Video continuation

Veo 3.1 Extend Controls

Fast / quality modes / Existing Veo taskId

Veo 3.1 Extend Latency

First poll after 30-60 seconds

Continuation API

Key Veo 3.1 Extend capabilities

Veo 3.1 Extend video generation

Use Veo 3.1 Extend for Video-to-video continuation from an existing Veo 3.1 task workflows with Playground controls aligned to the public API docs.

Veo 3.1 Extend reference control

Upload supported reference assets where available, then reuse the same settings in generated API examples.

Veo 3.1 Extend async delivery

Plan around long-running generation with recommended polling and callback-ready production integration.

What can you build with Veo 3.1 Extend?

Veo 3.1 Extend product videos

Create product reveals, ecommerce ads, launch clips, and campaign motion assets with reusable API parameters.

Veo 3.1 Extend social creative

Generate short videos for social channels and iterate quickly across prompt, duration, resolution, and ratio settings.

Veo 3.1 Extend storyboard workflows

Use text prompts and references to validate scenes, shots, and motion ideas before committing production budget.

Veo 3.1 Extend notes & limitations

The taskId must come from a previous /generateTask/veo-3-1 response and must still be usable for extension.
Only fast and quality extend modes are supported.
Prompt length must be between 1 and 10000 characters.
Invalid, expired, or cross-model task IDs can fail with TASKID_ERROR.
Extended result URLs may be temporary and should be downloaded promptly after completion.

Veo 3.1 Extend frequently asked questions

Start building

Try the playground above, then move to the API docs when you're ready to integrate.

Try playground View API docs