Kling 4.0 vs Seedance 2.5: Duration, Resolution and Price Compared

Kling 4.0 and Seedance 2.5 both make clips of up to 30 seconds with audio from text, a first frame, first and last frames or reference images, and both take a resolution field. Seedance 2.5 from ByteDance adds 480p and 4k tiers and up to 16 reference images, while Kling 4.0 from Kuaishou offers 720p and 1080p with up to 10. Kuaishou released Kling 4.0 on October 15, 2026, and it has been available on the Makernice API since October 30, 2026. This comparison covers catalog facts and price only and does not rank output quality.

How do Kling 4.0 and Seedance 2.5 compare at a glance?

Source: GET /v1/models and GET /v1/pricing (price list v12, November 2, 2026). In the mode row, t2v is text-to-video, i2v is image-to-video, flf is first and last frame and r2v is reference-to-video. Catalog facts only, no quality ranking.

Which Kling 4.0 features are not available through the Makernice API?

Kling 4.0 on Makernice covers four modes at 720p and 1080p. The capabilities below are not available on Makernice through this API (as of October 30, 2026). This describes what the Makernice API accepts, not what Kuaishou offers elsewhere.

• 4K output. For 4K on Makernice, use Seedance 2.5 or Kling 3.0 4K.
• A timeline of up to 10 keyframes. The API takes one first frame (image_url) and an optional last frame (last_image_url).
• Video references. Reference-to-video takes images only, through reference_images.
• Motion Control.
• Kling 4.0 Flash.

How long can a Kling 4.0 or Seedance 2.5 video be?

Kling 4.0 accepts a duration from 3 to 30 seconds and Seedance 2.5 accepts 4 to 30 seconds; both use 5 seconds when duration is left out. A 3 second clip is only possible on Kling 4.0, and both reach 30 seconds in a single clip.

Which resolutions does each model offer?

Both models take a resolution field and default to 720p. Kling 4.0 accepts 720p and 1080p. Seedance 2.5 accepts 480p, 720p, 1080p and 4k. Any other value sent to Kling 4.0 is rejected with a 400 error before anything is held.

Which aspect ratios does each model accept?

For text-to-video and reference-to-video, Kling 4.0 accepts 16:9, 9:16, 1:1 and 21:9. Seedance 2.5 accepts eight values in every mode: adaptive, 16:9, 9:16, 1:1, 4:3, 3:4, 21:9 and 9:21. In image-to-video and first and last frame, Kling 4.0 takes no aspect_ratio field and the clip follows the shape of the input image.

Do Kling 4.0 and Seedance 2.5 generate audio?

Yes. Every Kling 4.0 clip and every Seedance 2.5 clip comes with an audio track, and neither model has a switch to turn sound off. Kling 4.0 has no generate_audio field. For a silent clip, use Wan 3.0 with generate_audio set to false.

How much does a 5, 10 or 30 second clip cost?

Price list v12 (as of November 2, 2026). Clip price = per-second price × seconds, rounded to the cent; the quote shows the exact amount. Audio is included in every price below.

At 720p, Seedance 2.5 costs 1.54× the per-second price of Kling 4.0; at 1080p the multiple is 2.55×. The 480p and 4k rows exist for Seedance 2.5 only.

Live prices: Pricing or GET https://api.makernice.com/v1/pricing (no key needed).

How do you switch from Seedance 2.5 to Kling 4.0 in code?

Change model. Both models accept the resolution, duration and aspect_ratio values used below, so nothing else changes.

  {
-   "model": "seedance-2.5",
+   "model": "kling-4.0",
    "mode": "t2v",
    "prompt": "A cyclist rides through a crowded night market, neon signs reflecting in puddles, handheld tracking shot.",
    "resolution": "1080p",
    "duration": 10,
    "aspect_ratio": "16:9"
  }

import os, requests

API = "https://api.makernice.com/v1"
H = {"Authorization": f"Bearer {os.environ['MAKERNICE_API_KEY']}"}
job = {"mode": "t2v", "prompt": "A cyclist rides through a crowded night market, neon signs reflecting in puddles, handheld tracking shot.",
       "resolution": "1080p", "duration": 10, "aspect_ratio": "16:9"}

for model in ("seedance-2.5", "kling-4.0"):
    q = requests.post(f"{API}/generations/quote", json={**job, "model": model}, headers=H, timeout=30).json()
    print(model, f"${int(q['amount']) / 1e6:.2f}")   # $6.42 · $2.52

Quoting is free and holds nothing; each quote is locked for 12 minutes. When you move other Seedance 2.5 requests to Kling 4.0, check four things: Kling 4.0 rejects the seed option, any resolution other than 720p or 1080p, ratios outside 16:9, 9:16, 1:1 and 21:9, and more than 10 reference images. Create the generation with the quote_id and an Idempotency-Key, then poll (quickstart).

Should you choose Kling 4.0 or Seedance 2.5?

• Pick Kling 4.0 for 720p or 1080p, clips as short as 3 seconds, or when its per-second price ($0.168 at 720p, $0.252 at 1080p) fits your budget.
• Pick Seedance 2.5 for 480p drafts, 4k output, more than 10 reference images (up to 16), ratios such as 4:3, 3:4 or 9:21, an aspect ratio in image-to-video, or the seed option.
• When the look decides it, run the same prompt on both: quotes are free, so compare the price first and judge the results yourself.

Next: Kling 4.0 vs Kling 3.0 covers what changed inside the Kling line, Seedance 2.5 vs Kling 3.0 compares the older Kling models, and the Pricing page lists every tier.