Seedance 2.5, according to ByteDance Seed
ByteDance Seed launched Seedance 2.5 on 2026-07-31. Its launch post lists these capabilities:
- Up to 30 seconds of audio and video in a single pass, with multiple rounds of extension for longer pieces.
- Up to 30 images, 10 video clips and 10 audio clips as references in one generation, including clay-render, motion and creative references.
- Timestamp-level editing of audio and video, plus green-screen, camera-perspective and reference-based editing.
Kling 4.0, according to fal
fal's Kling 4.0 page, last updated 2026-10-21, lists these capabilities:
- 3 to 30 seconds per generation, optionally split into shots with their own prompts and durations.
- Two-channel stereo audio with dialogue, singing, sound effects and lip sync.
- Up to 10 images, 5 videos (30 seconds in total) and 7 elements, 15 assets at most; up to 3 elements can carry a voice.
- Reference videos can guide motion and camera work, including white-model and depth-map renders.
- Edits of an existing 3 to 30-second video.
- 720p or 1080p on fal, in 21:9, 16:9, 1:1 or 9:16. fal notes that Kling has announced 4K output and extension up to 2 minutes as coming soon.
Third-party API prices
fal lists Kling 4.0 Reference to Video at $0.157 per second at 720p and $0.235 per second at 1080p. With video references or video elements it is $0.094 and $0.141 per second, billed on input plus output length with a minimum of twice the output. The Seedance 2.5 launch post does not publish an API price.
These are third-party list prices checked on 2026-10-26, not prices in this generator. Here Seedance 2.5 is charged in credits, and the quote for your duration and resolution is shown before you submit.
How to choose
- Many cast members, props and locations in one shot: Seedance 2.5 accepts more images, clips and audio files.
- A reusable character with its own voice: Kling 4.0 elements, up to 3 of which can carry a voice.
- Documented 1080p: Kling 4.0 on fal. Seedance 2.5 renders at 480p or 720p in this generator.
- Past 30 seconds: Seedance 2.5 documents multi-round extension; Kling's 2-minute extension is announced as coming soon.
Run your brief on Seedance 2.5 here
- Pick the mode. Text to Video for a scene from scratch, Image to Video for a first (and optionally last) frame, Reference to Video when identity, motion or sound must carry over.
- Set length and resolution. Draft at 480p and a short duration, then render the keeper at 720p and up to 30 seconds.
- Write one continuous shot. Describe subject, action, camera movement, light and sound in the order they happen, and check the credit quote before you submit.