Video

Veo 3.1

Veo 3.1 API supports Google video generation for text-to-video, first/last-frame animation, and reference-guided workflows with fast and quality modes.

Fast / quality modesThree generation types16:9 / 9:16 / autoUp to 3 reference images

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Endpoints

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

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

Authentication

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Request body

request_type

async

Use callback with callback_url for webhooks.

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

moderequired

Typeselect

Choose fast for lower cost or quality for higher fidelity. Reference-to-video requires fast mode.fast · quality

promptrequired

Typestring

Describe the action, camera, subject, mood, and visual details for the output video.

generationTyperequired

Typeselect

Choose text-to-video, first/last frame animation, or reference-guided video generation.TEXT_2_VIDEO · FIRST_AND_LAST_FRAMES_2_VIDEO · REFERENCE_2_VIDEO

aspect_ratiooptional

Typeselect

Choose the output frame ratio. Reference-to-video only supports 16:9.16:9 · 9:16 · auto

watermarkoptional

Typetext

Optional watermark text for the generated video.

seedoptional

Typetext

Optional random seed for reproducible generation attempts.

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
`mode`	select	required	Choose fast for lower cost or quality for higher fidelity. Reference-to-video requires fast mode.fast · quality
`prompt`	string	required	Describe the action, camera, subject, mood, and visual details for the output video.
`generationType`	select	required	Choose text-to-video, first/last frame animation, or reference-guided video generation.TEXT_2_VIDEO · FIRST_AND_LAST_FRAMES_2_VIDEO · REFERENCE_2_VIDEO
`aspect_ratio`	select	optional	Choose the output frame ratio. Reference-to-video only supports 16:9.16:9 · 9:16 · auto
`watermark`	text	optional	Optional watermark text for the generated video.
`seed`	text	optional	Optional random seed for reproducible generation attempts.

File parameters (URL arrays)

image_urls[mode=first_and_last_frames / omni_reference]Required for first_and_last_frames (1-2 images). Optional for omni_reference (1-9 images).Only in mode=first_and_last_frames / omni_reference

Example (cURL)

curl -X POST "https://api.apixo.ai/api/v1/generateTask/veo-3-1" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "quality",
      "prompt": "A cinematic flyover of a futuristic city at sunrise",
      "generationType": "TEXT_2_VIDEO",
      "aspect_ratio": "16:9"
    }
  }'

Full API documentation

Veo 3.1 API Guide

Veo 3.1 API for video generation workflows

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

Veo 3.1 workflow

Build and ship Veo 3.1 API workflows from one page

This Veo 3.1 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 prompt testing

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

Veo 3.1 demo review

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

Veo 3.1 API handoff

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

Veo 3.1 pricing clarity

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

Veo 3.1 input control

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

Veo 3.1 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 API?

Veo 3.1 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 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 API Technical Specs

Current Veo 3.1 API capabilities and integration-relevant constraints.

Veo 3.1 Modes

Text-to-video, first/last frames, and reference-to-video

Veo 3.1 Output

Fast / quality modes

Veo 3.1 Controls

Three generation types / 16:9 / 9:16 / auto

Veo 3.1 Latency

Typically 1-3 minutes

Google Video API

Key Veo 3.1 capabilities

Veo 3.1 video generation

Use Veo 3.1 for Text-to-video, first/last frames, and reference-to-video workflows with Playground controls aligned to the public API docs.

Veo 3.1 reference control

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

Veo 3.1 async delivery

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

What can you build with Veo 3.1?

Veo 3.1 product videos

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

Veo 3.1 social creative

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

Veo 3.1 storyboard workflows

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

Veo 3.1 notes & limitations

Prompt length must be between 1 and 10000 characters.
First/last-frame generation supports up to 2 image URLs.
Reference-to-video supports up to 3 image URLs, fast mode only, and 16:9 aspect ratio only.
Image-guided workflows should use public JPG, JPEG, or PNG URLs up to 10 MB.
Actual latency varies by prompt complexity, image inputs, selected route, and queue load.

Veo 3.1 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