Seedance 2.5 vs Veo 3.1 vs Kling 3.0: API price per second and features

The short answer

• Cheapest with sound: Veo 3.1 Fast at $0.11 a second at 1080p, then Kling 3.0 at $0.17. Veo 3.1 Fast clips run to 8 seconds, Kling 3.0 clips to 15.
• Longest clips and most inputs: Seedance 2.5 makes up to 30 seconds in one go and takes text, images, first and last frames, reference images and a video. It costs $0.25 a second at 720p and $0.55 at 1080p, the lowest 1080p price we found for it, and $0.15 at 720p when you give it a video to work from.
• Google's top tier: Veo 3.1 is $0.40 a second with sound at 1080p and 4, 6 or 8 seconds long.
• All four take the same request on Revana; you change the model field. Every price is on the pricing page and every model in the catalogue.

Price per second with sound

Revana's list prices, checked October 2026. Seedance 2.5 always makes sound; Veo and Kling are cheaper still without it.

What an 8 second clip costs

Eight seconds is the longest clip all four can make, so it is the fairest single clip to price:

Length, resolution and inputs

Seedance 2.5 is the one to pick when a shot needs to run past 15 seconds, follow a reference video, or keep up to 30 reference images consistent. Veo 3.1 Fast is the cheap way to iterate on short shots with dialogue. Kling 3.0 goes to 15 seconds and 4K. Veo 3.1 is Google's highest tier at the same 8 second limit as Fast.

Against other APIs

Each model's price at ByteDance, Google, fal, Replicate and the rest is compared in its own guide: Seedance 2.5, Veo 3.1 and Kling 3.0. The cheapest AI video API guide covers every model at once.

Switching between them

Create a key on the sign-up page and send one JSON request; the docs list every field. The same request runs on any of the four by changing model to seedance-2.5, veo-3.1, veo-3.1-fast or kling-3.0:

curl https://api.revana.si/v1/generations \
  -H "Authorization: Bearer $REVANA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "input": {
      "prompt": "A chef plates a dessert in a busy kitchen, close-up, warm light, the clatter of pans behind her",
      "resolution": "720p",
      "duration": 8,
      "aspect_ratio": "16:9"
    },
    "max_cost_usd": 2.4
  }'

The finished job carries the video link and cost_usd, the exact amount charged. Failed jobs are not charged.