Seedance 2.5 vs Veo 3.1 vs Kling V3: choosing a video API
A practical comparison of today’s main video generation APIs — clip length, audio, references, resolution and price per second.
Oct 9, 2026 · API ManyVideo models now differ less in raw quality than in what they let you control: clip length, native audio, reference images and video, and how they price a second of output. Here is how the three most requested families compare on API Many.
Seedance 2.5: long clips and many references
Seedance 2.5 renders 4 to 30 seconds in one job with synchronized audio and accepts dozens of reference images, videos and audio clips. It also supports editing and extending an existing clip. It is billed per second by resolution, from from $0.12/ second.
Veo 3.1: dialogue and sound design
Veo 3.1 produces fixed 8-second clips with convincing speech, effects and music. Write the dialogue in quotes with the speaker named and describe the ambience. Fast and Quality variants trade speed for detail; the Fast tier starts at from $0.175/ request.
Kling V3: motion and image-to-video
Kling V3 is a strong choice for realistic motion and for animating a still image while keeping the subject intact. Standard mode is cheap enough for drafts; Pro and 4K modes are for finals. Pricing starts at from $0.112/ second.
How to choose
- Need more than 10 seconds in one take, or many references? Start with Seedance 2.5.
- Need people talking on camera? Veo 3.1.
- Animating product shots or portraits from a single image? Kling V3 or MiniMax H3.
- Iterating on ideas cheaply? Draft at 480p or with a Fast tier, then render the winner at full quality.
All of them share one request flow on API Many: POST /v1/videos/generations, then poll /v1/tasks/{id} or receive a webhook. Switching models is a change of the model field and its documented parameters.
Every model in this post is available on API Many. Pay as you go from $10.