flux-3/extend-video/draft
FLUX 3 Draft Extend: Fast low-cost clip continuation drafts at 720p
This page covers the first-last-frame draft endpoint in the FLUX 3 family. You pin a start still and an end still, then describe the middle; the model returns a quick 720p clip so you can validate the transition without paying full FLUX 3 First Last Frame rates.
The endpoint is built for the early loop of creative work: bookend composition checks, middle-motion tests, and batch draft runs. When a take looks right, reuse the returned draft cache with draft-enhance for a fuller finish.
FLUX 3 Draft Extend: Fast low-cost clip continuation drafts at 720p
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FLUX 3 Draft First Last Frame to Video bridges a start still and an end still into a fast 720p preview. It fits pose-to-pose trials, product reveals, and cheap transition tests before a full-quality pass.
Both use start and end frames; FLUX 3 Draft First Last Frame to Video returns a cheaper 720p preview plus a draft cache, while the full endpoint is better for polished 720p or 1080p deliverables.
FLUX 3 Draft First Last Frame to Video requires a prompt, start image URL, and end image URL. Duration is an integer from 5 to 20 seconds (default 5). Aspect ratios include auto plus common film and social frames.
An explicit duration pins where the end frame lands on the timeline. Without a fixed length, the bookend placement for FLUX 3 Draft First Last Frame to Video cannot be validated cleanly.
Along with the preview clip, FLUX 3 Draft First Last Frame to Video returns a reusable draft cache you can pass to draft-enhance for a fuller-quality render.
Yes. Prototype in the RunComfy model UI, then call the same FLUX 3 Draft First Last Frame to Video template through the RunComfy API with matching parameters. Generations consume usd / credits on both paths.
FLUX 3 Draft First Last Frame to Video is billed at $0.07 per second of generated draft video at 720p. A 5-second clip costs about $0.35; longer durations scale with the output length.
Stay on FLUX 3 Draft First Last Frame to Video for bookend drafts and early transition reviews. Move to the full first-last endpoint or draft-enhance for sharper finals.
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