doubao-seedance-2-5-260628, send draft: true to generate a 480p draft, then reference it through content[].draft_task.id to create a 1080p final video using the existing asynchronous task API.
The draft and final video are billed separately, and the draft task ID is valid for seven days. See the Draft mode guide for parameters, complete examples, and limits, or the overview for model selection.
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