What does Seedance 2.5 Video Extend do?

It generates a new cinematic continuation appended to an input video, starting from that video's last frame and guided by a text prompt.

What is `last_image` for?

An optional target frame URL. When set, the continuation interpolates from the input video's final frame toward this image instead of following the prompt alone.

How much does it cost?

Billed at 65% of the base per-second rate ($0.221/sec at 720p) on the combined duration of the input video plus the generated continuation, since a video reference is always present.

How long can the extension segment be?

Between 4 and 30 seconds, configurable via the `duration` parameter.

Does the extension include audio?

Yes by default — set `generate_audio` to `false` to skip generating synchronized audio for the new segment.

Back to Comparison Hub/Video Extend Pricing

Video to Video

Video Extend API Pricing

Seedance 2.5 Video Extend extends an input video with a new cinematic continuation generated from its last frame and a natural-language prompt.

Savings Alert-637% ↓Cheaper than Competitor

About Video Extend

Seedance 2.5 Video Extend is the video-extension endpoint in the [Seedance 2.5](/playground/seedance-2.5-text-to-video) family. It extends an input video with a new cinematic continuation generated from its last frame and a natural-language prompt, optionally interpolating toward a target end frame. Output resolution is 720p.

Interactive Savings Calculator

Estimate monthly API spend and compare absolute developer savings.

Monthly API Generations10,000 runs

50025,00050,00075,000100,000+

MuAPI Monthly Cost

$2210.00

$0.221/sec (720p)

Competitor Cost

$300.00

$0.03 per run

Estimated Monthly Savings$-1910.00

Annual Savings$-22920.00

Detailed Pricing Breakdown

Provider	Estimated Rate	Notes
muapiapp	$0.221/sec (720p)	Billed on the combined duration of the input video plus the generated continuation, at 65% of the base per-second rate.

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