Veo 3.1 API

Leverage Google DeepMind's Veo 3.1 model. Create 1080p videos with dialogue and SFX. Choose Fast for speed or Pro for maximum quality.

Model Type :

Veo 3.1 Fast Lite Veo 3.1 Pro Lite Veo 3.1 Fast Veo 3.1 Pro

Prompt

Estimated Cost

60 Credits

Sample Result

No sample available

Prompt

0 (suggested: 2,000)

Input Images

Upload up to 3 images (REFERENCE mode)

Click to upload or drag and drop

Supported formats: JPG, JPEG, PNG, WEBP
Maximum file size: 10MB; Maximum files: 3

Aspect Ratio

Only 16:9 is supported when using REFERENCE mode.

Duration

Quality

Click Generate to see preview

History

Max 20 items

0 running · 0 completed

Your generation history will appear here

Veo 3.1 API — Production-ready video with synced audio

Integrate Google's latest generative video model. Produce 4–8s clips with perfectly aligned speech and ambient sound. Supports vertical formats, reference images, and rapid prompt iteration.

What can you build with Veo 3.1 API?

Instant social media content

Automate the creation of 9:16 Shorts and Reels. The Veo 3.1 API delivers high-quality renders, making it perfect for content engines.

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Precision control with references

Maintain character and style consistency. Pass reference images or start/end frames via the API to guide the video generation process accurately.

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Synchronized audio soundscapes

Generate video and audio in a single pass. The model creates dialogue, Foley, and soundtracks that match the visual action frame-by-frame.

Start Using API

Why developers choose Veo 3.1 API

Veo 3.1 offers two variants: Fast for speed and cost efficiency, Pro for maximum visual fidelity. Both include native audio generation.

Two variants for different needs

Fast variant for rapid iteration and cost efficiency. Pro variant for maximum quality and complex scenes.

Cost-effective scaling

Lower compute costs per second make it feasible to run thousands of iterations for A/B testing ads or personalizing user content.

Production-ready outputs

Delivers 720p for drafts and 1080p for final export, with built-in watermarking to ensure safety and compliance.

How to integrate Veo 3.1

A simple API workflow to generate video with audio from text or images.

Step 1 — Choose variant & configure

Select Fast or Pro variant. Set your desired duration (4s, 6s, 8s), aspect ratio, and resolution (720p/1080p).

Step 2 — Send prompt & references

Submit your text prompt along with optional reference images for style control or specific start/end frames for transitions.

Step 3 — Retrieve video + audio

Receive the MP4 output with fully embedded, synchronized audio ready for immediate playback or publishing.

Open API Playground

Key Capabilities

Advanced features available via the Veo 3.1 API endpoint

Audio

Native Audio Generation

Creates speech, music, and sound effects that are temporally aligned with video actions.

Flexibility

Fast & Pro Variants

Choose Fast for speed and cost efficiency, or Pro for maximum visual quality.

Control

Visual Control

Use image-to-video or start/end frame inputs to dictate flow and composition.

Resolution

Flexible Resolutions

Switch between 720p for speed and 1080p for quality without changing the model.

Physics

Physics Simulation

Updated world model handles fluid dynamics, lighting, and collisions with high realism.

Trust

SynthID Watermarking

Imperceptible watermarking embedded by default for responsible AI content usage.

Veo 3.1 API Variants Comparison

Compare Fast and Pro variants

Model	Duration	Resolution	Price	Strength
Veo 3.1 Fast	4/6/8s	720p / 1080p	~$0.15/sec (EvoLink)	Lowest latency; Native Audio; Up to 3 reference images; Ideal for rapid iteration.
Veo 3.1 Pro	4/6/8s	720p / 1080p	Premium pricing	Maximum visual fidelity; Complex physics; First/last frame mode; Best for final assets.
Sora (Pro)	10–15s	Up to 1080p	~$0.20/10s (Standard)	Longer native duration; strong prompt adherence; competitive physics.

Frequently Asked Questions

Everything you need to know about the product and billing.

The Veo 3.1 API provides programmatic access to Google's video generation model. It offers two variants: Fast for speed and cost efficiency, Pro for maximum visual fidelity. Both support 1080p resolution and native audio.

Fast variant prioritizes speed and lower cost, ideal for rapid iteration. Pro variant offers higher visual quality and better handling of complex scenes, ideal for final production assets.

Yes. Both Fast and Pro variants generate native audio (including dialogue, ambience, and music) that matches the video content in a single generation pass.

Absolutely. The API supports 'Reference Images' to guide the visual style. Fast supports up to 3 images, Pro supports up to 2 images for first/last frame mode.

The API outputs MP4 files in 720p or 1080p resolution. You can choose between 16:9 (landscape) or 9:16 (vertical) aspect ratios, with durations of 4, 6, or 8 seconds.

Yes, Veo 3.1 is designed for commercial workflows, including advertising and social media automation. It includes SynthID watermarking to ensure transparency and compliance.

API Reference

Select endpoint

Authentication

All APIs require Bearer Token authentication.

Header

Authorization: 
Bearer YOUR_API_KEY

Get API Key

POST

/v1/videos/generations

Create Video

Veo 3.1 Pro (Vertex AI) (veo-3.1-generate-preview) model supports text-to-video, first-frame image-to-video and other modes.

Asynchronous processing mode, use the returned task ID to .

Generated video links are valid for 24 hours, please save them promptly.

Request Parameters

modelstringRequiredDefault: veo-3.1-generate-preview

Video generation model name.

Exampleveo-3.1-generate-preview

promptstringRequired

Prompt describing what kind of video to generate.

Notes

Limited to 2000 tokens

ExampleA cat playing piano

aspect_ratiostringOptionalDefault: auto

Video aspect ratio. When set to auto: image-to-video will automatically select based on the input image ratio, text-to-video will automatically select based on the prompt content.

Value	Description
auto	Automatic selection based on input
16:9	Landscape video
9:16	Portrait video

Exampleauto

image_urlsarrayOptional

Reference image URL list for image-to-video feature.

Notes

1 image for first-frame video generation
2 images for first-and-last-frame video generation
Max size: 10MB per image
Formats: .jpg, .jpeg, .png, .webp
URLs must be directly viewable by the server

Examplehttp://example.com/image1.jpg

generation_typestringOptional

Video generation mode, default matches based on image count.

Value	Description
TEXT	Text to video
FIRST&LAST	First and last frame to video (1-2 images)

ExampleTEXT

enhance_promptbooleanOptionalDefault: true

Whether to automatically translate the prompt to English. When enabled, non-English prompts will be automatically translated to English for better generation results.

Exampletrue

callback_urlstringOptional

HTTPS callback address after task completion.

Notes

Triggered on completion, failure, or cancellation
Sent after billing confirmation
HTTPS only, no internal IPs
Max length: 2048 chars
Timeout: 10s, Max 3 retries

Examplehttps://your-domain.com/webhooks/video-task-completed

durationintegerOptionalDefault: 4

Video duration in seconds.

Value	Description
4	4 seconds
6	6 seconds
8	8 seconds

Example4

qualitystringOptionalDefault: 720p

Video resolution quality.

Value	Description
720p	HD resolution
1080p	Full HD resolution

Example720p

generate_audiobooleanOptionalDefault: true

Whether to generate audio with the video. Enabling this incurs additional cost.

Exampletrue

nintegerOptionalDefault: 1

Number of videos to generate.

Notes

Minimum: 1
Maximum: 4

Example1

negative_promptstringOptional

Negative prompt to specify what should not appear in the video.

Exampleblurry, low quality

seedintegerOptional

Random seed for reproducible generation.

Notes

Range: 1 to 4294967295

Example12345

person_generationstringOptionalDefault: allow_adult

Control person generation in the video.

Value	Description
allow_adult	Allow adult person generation
dont_allow	Do not allow person generation

Exampleallow_adult

resize_modestringOptionalDefault: pad

Image resize mode for image-to-video generation.

Value	Description
pad	Pad image to fit aspect ratio
crop	Crop image to fit aspect ratio

Examplepad

Request Example

{
  "model": "veo-3.1-generate-preview",
  "prompt": "A cat playing piano",
  "aspect_ratio": "16:9"
}

Response Example

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "veo-3.1-generate-preview",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 180,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 60,
    "user_group": "default"
  }
}