UniAll AI SEO/GEO · Veo3.1 Fast · 2026-06-01

What is Veo3.1 Fast?

Veo3.1 Fast is a speed-oriented AI video generation model available on UniAll AI. The public model ID is `veo3.1-fast-video-720p`. It is designed for teams that need faster iteration, short-form video assets, product clips, ad concepts, and automated video workflows.

Compared with standard Veo3.1 video variants, Veo3.1 Fast prioritizes lower latency and lower per-second cost while keeping the core Veo-style generation modes available.

Capability overview

Veo3.1 Fast supports multiple video generation workflows:

• **Text to video**: generate a clip from a prompt.
• **Image to video**: animate a reference image.
• **First/last frame video**: guide motion between a start and end frame.
• **Video to video / video edit**: use a source video as input.
• **Reference media to video**: generate with prompt-led visual reference.
• **Video extension**: continue or extend video-style content when supported by the selected workflow.

Core parameters include:

| Parameter | Supported values / notes | |---|---| | Model ID | `veo3.1-fast-video-720p` | | Endpoint | `POST /v1/videos/generations` | | Execution | Async | | Duration | 4s, 6s, 8s | | Aspect ratio | 16:9, 9:16 | | Resolution options | 720p, 1080p, 4K | | Audio | Optional with audio-enabled pricing tier | | Output count | 1 video per generation | | Image input | PNG, JPEG, WebP | | Video input | MP4, QuickTime, WebM |

Veo3.1 Fast vs standard Veo3.1

Choose **Veo3.1 Fast** when speed and cost efficiency matter more than maximum render refinement. It is a practical option for:

• rapid creative testing,
• social video batches,
• ad variation generation,
• e-commerce product motion clips,
• storyboard previews,
• automated content pipelines.

Choose **standard Veo3.1 Video** when you want to spend more per second for potentially stronger quality or more polished outputs in final production contexts.

Pricing comparison on UniAll AI

Pricing is billed per generated video second and varies by resolution and audio setting.

| Variant | Example user price | |---|---:| | Veo3.1 Fast 720p | $0.068 / second | | Veo3.1 Fast 720p with audio | $0.102 / second | | Veo3.1 Fast 1080p | $0.068 / second | | Veo3.1 Fast 1080p with audio | $0.102 / second | | Veo3.1 Fast 4K | $0.204 / second | | Veo3.1 Fast 4K with audio | $0.238 / second | | Standard Veo3.1 720p | $0.136 / second | | Standard Veo3.1 720p with audio | $0.272 / second |

For API users and partners, UniAll AI may provide different pricing profiles. Generation failures are refundable when failure refund rules apply.

API usage example

Veo3.1 Fast uses an async video generation endpoint. Submit a task, then poll or handle the returned task status according to your integration flow.

```bash curl -X POST "https://api.uniall.ai/v1/videos/generations" \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "veo3.1-fast-video-720p", "generation_mode": "text_to_video", "prompt": "A cinematic product reveal, soft studio lighting, smooth camera movement.", "duration": 8, "aspect_ratio": "16:9", "resolution": "720p", "generate_audio": true, "video_count": 1 }' ```

Example: image to video

```json { "model": "veo3.1-fast-video-720p", "generation_mode": "image_to_video", "prompt": "Animate the product with a slow dolly-in camera move and premium studio lighting.", "image_url": "https://example.com/product.png", "duration": 6, "aspect_ratio": "9:16", "resolution": "720p" } ```

Example: first and last frame

```json { "model": "veo3.1-fast-video-720p", "generation_mode": "first_last_frame", "prompt": "Create a smooth transition from morning city street to neon night scene.", "first_image_url": "https://example.com/start.png", "last_image_url": "https://example.com/end.png", "duration": 8, "aspect_ratio": "16:9", "resolution": "1080p" } ```

Who should use Veo3.1 Fast?

Veo3.1 Fast is best for developers, marketing teams, agencies, and platform builders that need reliable video generation inside an API workflow. It is especially useful for short-form content systems where many ideas must be tested before selecting final clips.

Good fits include:

• AI video SaaS products,
• creative automation tools,
• ad generation platforms,
• e-commerce media pipelines,
• creator tools for 9:16 short videos,
• internal brand content workflows.

Practical selection guide

Use **Veo3.1 Fast** if you need faster turnaround, predictable per-second billing, and support for common video generation modes. Use standard Veo3.1 when the specific job justifies higher cost for final-quality output review.

For most production teams, a cost-efficient workflow is to prototype with Veo3.1 Fast, then reserve standard or higher-resolution variants for selected final renders.