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FLUX 3 Draft: Fast Low-Cost Text-to-Video Previews on Models and API | RunComfy

blackforestlabs/flux-3/text-to-video/draft

FLUX 3 Draft creates fast 720p text-to-video previews from prompts, with a reusable cache for later full-quality enhancement.

The text prompt describing the draft video.
Aspect ratio of the generated draft. auto lets the model choose.
Draft duration in whole seconds from 5 through 20, or auto.
Whether to generate audio for the draft video.
The safety tolerance level for the generated video. 0 is the strictest and 4 is the most permissive.
Idle
The rate is $0.06 per second of generated draft video (720p).

Introduction To FLUX 3 Draft

Black Forest Labs' FLUX 3 Draft turns a written scene into a fast 720p text-to-video preview with optional native audio, built for cheap prompt trials before a full-quality pass. Trading expensive final-quality reruns for quick draft checks while keeping a reusable draft cache for later enhancement, FLUX 3 Draft helps marketers, previz artists, and social teams iterate without burning budget. For developers, FLUX 3 Draft on RunComfy can be used both in the browser and via an HTTP API, so you don't need to host or scale the model yourself.
Ideal for: Prompt Draft Previews | Low-Cost Storyboards | High-Volume Social Tests

Black Forest Labs / FLUX 3 Draft#


This page covers the text-to-video draft endpoint in the FLUX 3 family. You describe a scene in plain language; the model returns a quick 720p clip so you can validate ideas without paying full FLUX 3 Video rates.


The endpoint is built for the early loop of creative work: prompt tuning, shot planning, and batch draft runs. When a take looks right, reuse the returned draft cache with draft-enhance for a fuller finish.

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Frequently Asked Questions

What is FLUX 3 Draft best used for?

FLUX 3 Draft is a Black Forest Labs text-to-video endpoint that renders fast 720p preview clips from a written prompt. It fits prompt trials, storyboards, and high-volume draft runs where speed and cost matter more than final sharpness.

How does FLUX 3 Draft differ from full FLUX 3 Video?

Both share the text-to-video path; FLUX 3 Draft outputs a cheaper 720p preview and returns a draft cache you can enhance later, while full FLUX 3 Video is better for polished 720p or 1080p deliverables.

What duration and aspect ratios does FLUX 3 Draft support?

FLUX 3 Draft accepts duration as auto or 5–20 seconds, with aspect ratios auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, and 9:16. Check the RunComfy parameter panel for the live controls on this page.

Does FLUX 3 Draft need reference images?

No. FLUX 3 Draft is text-only: scene, motion, lighting, and camera direction all come from the prompt. For still-driven drafts, use FLUX 3 Draft Image to Video or other FLUX 3 draft modes.

What is the draft cache returned by FLUX 3 Draft?

Along with the preview clip, FLUX 3 Draft returns a reusable draft cache that can be passed to draft-enhance for a fuller-quality render without regenerating the whole idea from scratch.

Can developers call FLUX 3 Draft through the RunComfy API after trying it in the UI?

Yes. Prototype in the RunComfy model UI, then call the same FLUX 3 Draft template through the RunComfy API with matching parameters. Generations consume usd / credits on both paths.

How much does FLUX 3 Draft cost on RunComfy?

FLUX 3 Draft is billed at $0.06 per second of generated draft video at 720p. A 5-second clip costs about $0.30; longer durations scale with the output length.

When should I stay on FLUX 3 Draft versus moving to full FLUX 3 Video?

Stay on FLUX 3 Draft for drafts, batch variants, and early creative reviews. Move to full FLUX 3 Video or draft-enhance when you need sharper finals for ads, client delivery, or higher-resolution platforms.

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Examples Of FLUX 3 Draft

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