Video

Veo 3.1

Veo 3.1 supports Google video generation for text-to-video, first/last-frame animation, reference-guided workflows, and extending completed Veo results.

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Lite / fast / quality modes

4 / 6 / 8 second clips

720p / 1080p / 4k

Up to 3 reference images

Generated preview

Veo 3.1

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Create with Veo 3.1

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Authentication & Integration

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Integrate with AI

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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

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 lite, fast, or quality. Reference-to-video requires fast mode.lite · 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

durationconditional

Typeselect

Choose the output clip length. Veo 3.1 supports 4, 6, or 8 seconds.4 · 6 · 8Only in generationType=TEXT_2_VIDEO | FIRST_AND_LAST_FRAMES_2_VIDEO | REFERENCE_2_VIDEO

resolutionconditional

Typeselect

Choose the output resolution. Billing defaults to 720p when omitted.720p · 1080p · 4kOnly in generationType=TEXT_2_VIDEO | FIRST_AND_LAST_FRAMES_2_VIDEO | REFERENCE_2_VIDEO

aspect_ratioconditional

Typeselect

Choose the output frame ratio.16:9 · 9:16 · autoOnly in generationType=TEXT_2_VIDEO | FIRST_AND_LAST_FRAMES_2_VIDEO | REFERENCE_2_VIDEO

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 lite, fast, or quality. Reference-to-video requires fast mode.lite · 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
`duration`	select	conditional	Choose the output clip length. Veo 3.1 supports 4, 6, or 8 seconds.4 · 6 · 8Only in generationType=TEXT_2_VIDEO \| FIRST_AND_LAST_FRAMES_2_VIDEO \| REFERENCE_2_VIDEO
`resolution`	select	conditional	Choose the output resolution. Billing defaults to 720p when omitted.720p · 1080p · 4kOnly in generationType=TEXT_2_VIDEO \| FIRST_AND_LAST_FRAMES_2_VIDEO \| REFERENCE_2_VIDEO
`aspect_ratio`	select	conditional	Choose the output frame ratio.16:9 · 9:16 · autoOnly in generationType=TEXT_2_VIDEO \| FIRST_AND_LAST_FRAMES_2_VIDEO \| REFERENCE_2_VIDEO
`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[generationType=FIRST_AND_LAST_FRAMES_2_VIDEO | REFERENCE_2_VIDEO]Upload up to 2 images for first/last frames, or up to 3 images for reference-to-video.Only in generationType=FIRST_AND_LAST_FRAMES_2_VIDEO | REFERENCE_2_VIDEO

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": "lite",
      "prompt": "A cinematic flyover of a futuristic city at sunrise",
      "generationType": "TEXT_2_VIDEO",
      "duration": 6,
      "resolution": "1080p",
      "aspect_ratio": "16:9"
    }
  }'

Full API documentation

Veo 3.1 Tips

Create video generation with Veo 3.1

Use Veo 3.1 through APIXO to try prompts, inspect examples, compare costs, and keep useful settings ready for future generations.

Create

Start with an idea

Pick a model, tune the settings, and create in one place.

Write an idea

Describe what you want to make.

Use an example

Start from a ready-made style.

Adjust the look

Tune the key settings quickly.

Create

Generate when everything feels right.

Keep results

Save what you want to revisit.

Try again

Make the next version faster.

Veo 3.1 API Technical Specs

Current Veo 3.1 capabilities and important creation limits.

Veo 3.1 Modes

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

Veo 3.1 Output

Lite / fast / quality modes

Veo 3.1 Controls

4 / 6 / 8 second clips / 720p / 1080p / 4k

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, reference-to-video, and video extension creation with simple controls for prompts, references, and output settings.

Veo 3.1 reference control

Upload supported reference assets where available, then keep refining the same idea on the model page.

Veo 3.1 generation status

Keep track of longer video generations while the result is being prepared.

What can you build with Veo 3.1?

Veo 3.1 product videos

Create product reveals, ecommerce ads, launch clips, and campaign motion assets.

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.

Read FAQ

Veo 3.1 notes and questions

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 and requires fast mode.

Duration supports 4, 6, or 8 seconds.

Resolution supports 720p, 1080p, or 4k.

Extend mode requires a completed Veo 3.1 task ID.

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.

Yes. Use the Create tab to try prompts, upload supported inputs, and adjust settings directly in the browser.

APIXO

Create with Veo 3.1

Write a prompt, adjust the settings, and generate your next result in one place.

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