Veo 3.1
prospolabs/veo-3-1
Google Veo 3.1 — top-tier quality with the best lip sync and audio generation available. Adds a reference-to-video mode for multi-image scene composition.
Starts from
Retail $0.200
Input
Billed by output length — final charge = rate × clip seconds.
Typically completes in 30–90s.
Result
IdleOr write your own prompt and hit Generate.
01overview
What is Veo 3.1?
Veo 3.1 is Google's top-tier video model, and on Prospolabs it is the flagship Veo you reach for when quality has to be uncompromising. It pairs cinematic visuals with the best lip sync and native audio generation available, so dialogue, ambient sound, and effects land in sync without a separate audio pass. Resolutions run up to 4K, with control over duration, aspect ratio, negative prompts, and seeds.
Beyond text-to-video and image-to-video, Veo 3.1 adds a reference-to-video mode that composes up to three reference images into a single coherent scene — useful for holding a character, product, or style consistent across a shot. On Prospolabs the UI and API charge the exact same USD-per-second price, you pay only for what you generate, and failed runs are auto-refunded, so you never burn budget on a bad render.
Top-tier Veo, ~40% under retail
Prospolabs runs Veo 3.1 at about 40% below typical retail. 720p/1080p with audio off is $0.12/sec (retail $0.20); with audio on it's $0.24/sec (retail $0.40). 4K is $0.24/sec audio off and $0.36/sec audio on (retail $0.40 and $0.60). That puts an 8-second 1080p audio-on clip at $1.92 and an 8-second 4K audio-on clip at $2.88. No tokens, no subscription — pay-as-you-go in USD and top up from $5.
02capabilities
What Veo 3.1 can do
Best-in-class lip sync and native audio
Veo 3.1 generates synchronized audio alongside the video — dialogue with tight lip sync, ambient soundscapes, and sound effects — in a single pass. Toggle audio on when you need a finished clip, or off when you plan to score it later and want the lower per-second rate on Prospolabs.
Three generation modes
Run mode "text" for text-to-video, mode "image" to animate a starting frame, or mode "reference" to compose up to 3 reference images into one scene for character, product, or style consistency. Reference mode is fixed at 8 seconds; text and image modes support 4s, 6s, or 8s.
Up to 4K resolution
Choose 720p, 1080p, or 4K output for clean detail on cinema displays, broadcast, and high-end marketing. On Prospolabs 4K is priced separately so you only pay the premium when a project actually needs it.
Creative controls
Pick 16:9 or 9:16 aspect ratio for landscape or vertical delivery, and steer text and image modes with negative_prompt to exclude unwanted elements plus a seed for reproducible results across iterations.
03use cases
What people build with Veo 3.1
Dialogue-driven scenes
When a shot needs spoken lines that actually match the mouth, Veo 3.1's lip sync and native audio let you generate a talking character and a finished soundtrack together — no manual dubbing or separate voice pass.
Consistent characters and products
Use reference mode to fold up to three images into one 8-second scene, keeping a spokesperson, mascot, or product looking the same across campaign clips.
4K broadcast and cinema delivery
Generate at 4K for content destined for large screens, TV, or premium ad placements where 1080p upscaling would show its seams.
Vertical social content
Render directly to 9:16 for Reels, Shorts, and TikTok, then iterate cheaply on Prospolabs with audio off until the cut is locked, switching audio on for the final render.
04api
Call Veo 3.1 from your code
The Prospolabs Veo 3.1 API is async: submit a job, poll for status, then download the result. The same USD-per-second price applies whether you generate from the API or the Prospolabs UI, and failed runs are auto-refunded.
Full Veo 3.1 API reference →- 01
POST to /v1/generate with model id "veo-3-1", a "mode" of "text", "image", or "reference", and your prompt plus controls (duration, resolution, aspect_ratio, audio, and for text/image modes negative_prompt and seed).
- 02
For mode "image" supply a starting frame; for mode "reference" supply up to 3 reference images to compose into one 8-second scene.
- 03
Receive a generation_id back immediately and poll it for status while the job runs.
- 04
When the job completes, download from output_url — the link stays valid for 7 days.
?questions
Veo 3.1 FAQ
Prospolabs prices Veo 3.1 per second, about 40% under retail. 720p/1080p is $0.12/sec audio off ($0.20 retail) and $0.24/sec audio on ($0.40 retail). 4K is $0.24/sec audio off ($0.40 retail) and $0.36/sec audio on ($0.60 retail). You pay only for what you generate.
An 8-second 1080p clip with audio on is $1.92 on Prospolabs. The same length at 4K with audio on is $2.88. Drop audio and the per-second rate falls, so an 8-second 1080p clip with audio off is $0.96.
Yes. Veo 3.1 offers the best lip sync and native audio generation available, producing synchronized dialogue, ambient sound, and effects in the same pass. On Prospolabs you can switch audio off for a lower per-second rate when you plan to add your own sound later.
Reference mode composes up to 3 reference images into a single coherent scene, helping keep a character, product, or style consistent. On Prospolabs set mode to "reference"; this mode is fixed at 8 seconds.
Text and image modes support 4s, 6s, or 8s; reference mode is 8s only. Resolution can be 720p, 1080p, or 4K, and aspect ratio can be 16:9 or 9:16. Text and image modes also accept a negative_prompt and a seed.
Yes. Prospolabs charges the exact same USD-per-second rate whether you generate through the API or the UI. Submit a job via POST /v1/generate, poll the returned generation_id, then download from output_url, which stays valid for 7 days.
Failed runs are automatically refunded on Prospolabs, so you are never charged for a render that doesn't complete. There are no tokens or subscriptions — it's pay-as-you-go, and you can top up from $5.
Veo 3.1 is the top-tier option for maximum quality, best lip sync, and 4K. If you want quicker, cheaper drafts, the Fast and Lite variants on Prospolabs trade some quality for speed and price — compare them on Explore.
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