# Veo 3.1 — Google's flagship, with sound > Veo 3.1 on eroq: Google's flagship video model, 4 to 8 second clips at 720p or 1080p with dialogue, ambience and effects generated with the picture. SFW only. Veo 3.1 is Google's flagship video model: 4, 6 or 8 second clips at 720p or 1080p, with dialogue, ambience and effects generated together with the picture. It reads up to three reference pictures for identity and takes a first and a last frame, a seed and a negative prompt. 106 credits / second with sound — the same at 720p and 1080p — on the Creator plan and up. ## At a glance | | | | --- | --- | | Price | 106 credits / second with sound, at 720p or 1080p alike · silent costs less | | Length | 4, 6 or 8 seconds | | Resolution | 720p · 1080p (default) | | Formats | 16:9 · 9:16 | | Sound | Native — dialogue, ambience and effects · Soundtrack toggle | | Inputs | Text · start frame · end frame · up to 3 reference pictures · negative prompt · seed | | Access | Creator plan and up ($49/month) | | Content | Moderated upstream — SFW work only | ## What Veo 3.1 is for Veo 3.1 is the engine for clips that will be watched with the sound on. The soundtrack is generated with the picture — room tone, footsteps, a door, a line of dialogue — so an ad, a short or a character beat arrives with its sound instead of waiting for a sound pass. Eight seconds is its ceiling, so think in shots rather than scenes: one beat, finished. Longer pieces are a Film mode job — storyboard the scenes and render each one as its own Veo shot. ## How to prompt it - Write the sound as precisely as the picture: "rain on a tin roof, a kettle starting to whistle" beats "ambient sounds". - Keep dialogue short, in quotes and attributed — @Theo says "Wait for me." One or two lines fill an 8-second clip. - @mention your cast and elements: up to three of their pictures ride as references, anything beyond rides as text. - Put what should not appear in the Avoid field — the negative prompt — instead of negating inside the prompt. - Need an exact opening or closing image? Set a start or end frame and describe only the motion between them. ## Where it sits in the Veo family Veo 3.1 Fast renders the same 4 to 8 second clips with the same controls — three reference pictures, frames, seed, negative prompt — quicker and for far less, from the Hobby plan. Veo 3.1 Lite keeps the sound and the frames on every account but reads no reference pictures. Draft on Fast; render on 3.1 when the shot matters. ## Starting points - **Diner at 2 a.m.** — A late-night diner seen through a rain-streaked window, a waitress refilling a coffee cup says "Last call, hon," rain on the glass and a jukebox playing low, static camera, neon glow - **Garage engine start** — Close-up of hands turning the key on a vintage motorcycle in a cluttered garage, the engine coughs then roars to life, slow pull-back to the mechanic grinning, practical lights - **Ice in the glass** — Extreme close-up of whiskey poured over ice in a heavy glass on a dark bar, the ice cracking and clinking, warm backlight, static camera ## FAQ ### Does Veo 3.1 generate audio? Yes. With the Soundtrack toggle on, dialogue, ambience and sound effects are generated together with the picture. Turn it off for a silent clip, which costs less per second. ### How long can a Veo 3.1 clip be? 4, 6 or 8 seconds. Veo renders in two-second steps, and the studio snaps any other length onto that grid before pricing. ### How much does a Veo 3.1 clip cost? 106 credits / second with sound, the same at 720p and 1080p: 424 credits for 4 seconds, 636 credits for 6 and 848 credits for 8. A failed render refunds automatically. ### Is there a Veo 3.1 API? Yes. Send model "veo-3-1" to POST /v1/videos/generations with your eroq key — the same engine, controls and credit balance as the studio, documented in the video API reference. ### Can Veo 3.1 render mature content? No. Veo is moderated upstream and serves SFW work only. Mature fiction between adult characters renders on Motion One, eroq's own uncensored engine. ## Related - https://eroq.ai/compare/seedance-vs-veo-3 — Seedance vs Veo - https://eroq.ai/compare/veo-3-vs-kling — Veo vs Kling - https://eroq.ai/models/veo-3-1-fast — Veo 3.1 Fast - https://eroq.ai/docs/video — Video API reference --- This page as HTML: https://eroq.ai/models/veo-3-1 · Studio: https://eroq.ai/studio · Docs: https://eroq.ai/docs · Machine index: https://eroq.ai/llms.txt