Veo 3.1 Fast AI Video Generator

Veo 3.1 Fast is Google’s fast-tier video model for polished short-form clips from text or an owned reference image. On MixVio, the reviewed public routes return one private video with synchronized native audio at selectable 720p, 1080p, or 4K for 4, 6, or 8 seconds.

Use it for social ads, hero opens, dialogue-ready shorts, and concept takes where you want native audio and a tight 4/6/8 second cut. Prefer Seedance 2.0 when you need multimodal reference packs (multiple images, video, and audio together), or Kling 3.0 when you need longer 5/10/15 second clips with optional end-frame control on supported routes.

MixVio’s public Veo routes are Veo 3.1 Fast only: text to video or single-image image-to-video, synchronized native audio, 4/6/8 seconds, and selectable 720p–4K. We do not expose Veo 3.1 Standard-only controls on the public page—such as first-and-last-frame generation, multi-image reference packs, or scene extension. Choose Fast when you want polished short-form iteration with clear credits before generate.

Use Text to Video for a scene, camera, dialogue, and sound brief, or Image to Video with one owned reference image. Source images should be 16:9 or 9:16; other aspect ratios are cropped to a supported ratio when needed. Multimodal reference packs (multiple images, video, and audio together) are not offered on the public Veo Fast routes—use Seedance 2.0 when you need that workflow.

Yes. Public Veo 3.1 Fast routes return video with synchronized native audio. Describe dialogue, ambience, sound effects, or music in the brief, then review speech, lip sync, and mix before publishing.

Text to Video supports 16:9 and 9:16. Image to Video supports Source, 16:9, and 9:16. Each run produces one 4, 6, or 8 second clip at 720p, 1080p, or 4K. The generator shows the exact compatible choices for the selected route.

Veo 3.1 Fast reserves from 104 credits. Typical anchors on the public Fast routes: 104 / 156 / 208 credits for 4 / 6 / 8 seconds at 720p or 1080p, and 240 / 360 / 480 credits for the same durations at 4K. The generator shows the exact reservation before submission, and failed or canceled generations release it automatically.

Veo 3.1 Fast targets polished hero and social shorts with native audio on a fast tier at 4/6/8 seconds and selectable 720p–4K. Seedance 2.0 emphasizes multimodal reference packs (images, video, and audio) with selectable 720p–4K across 4–15 seconds. Kling 3.0 focuses on cinematic text or start-frame clips with flexible 5/10/15 second durations and optional end-frame control on supported image routes. Compare live credits, inputs, duration, and audio in the comparison table before generating.

Before commercial use, confirm the current Google / Veo terms and your rights to every prompt, reference, likeness, brand asset, voice, and sound direction. Prompts and references pass MixVio moderation and Provider safety checks; some requests may be rejected. Review identity, logos, dialogue, lip sync, and audio before publishing. MixVio does not guarantee exclusivity or trademark clearance.

Only use faces, voices, and likenesses you own or are authorized to use. Public figures, deceptive impersonation, deepfake-style face swaps, minors, and other prohibited content can be blocked by MixVio moderation or Provider safety checks. When a request is allowed, still review identity and consent before any commercial or public use.