Question 1

How does Seedance 2.5 compare to Seedance 2.1?

Accepted Answer

Seedance 2.5 offers native 4K resolution, extended durations up to 16 seconds, superior photorealism, and more advanced audio generation. It is designed for professional and premium production workflows.

Question 2

What is the maximum video duration?

Accepted Answer

Seedance 2.5 T2V supports up to 16 seconds per clip — the longest available in the Seedance model family.

Question 3

Is 4K output available?

Accepted Answer

Yes. Set `resolution` to `4K` for the highest quality output. 480p, 720p, and 1080p are also supported.

Question 4

What aspect ratios does it support?

Accepted Answer

Seedance 2.5 T2V supports 16:9, 9:16, 1:1, 4:3, 3:4, and 21:9 aspect ratios.

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