Why creators choose FLUX.3

FLUX.3 is Black Forest Labs' multimodal foundation model, the first to combine image, video, audio, and robotics in a single architecture. It does 20-second clips, supports six aspect ratios, extends video, and bundles sound. When you need flexibility and scale without switching models, FLUX.3 adapts to your workflow.

Twenty seconds in one generation

Double the length of most competing models. A 20-second clip holds a complete commercial, a narrative scene, or a product demonstration. That length means fewer seams to hide in the edit and more story you can tell without cutting. For creators building longer sequences, the per-second cost of one 20-second clip is often cheaper than stitching two 8-second clips.

Six aspect ratios, all in one model

21:9 cinematic, 16:9 landscape, 4:3 traditional, 1:1 square, 3:4 tall, and 9:16 mobile. Build content for every platform without changing models. TikTok vertical, Instagram square, YouTube landscape, and web all come from the same generation run with just an aspect ratio swap.

Video extension with sound

Extend your footage and add or update sound in the same pass. No separate audio generation, no sync work. The extension continues the camera motion and framing of your source clip while optionally adding new audio that matches the tone and style of what you already have.

Optional sound for scoring freedom

Leave sound off when you plan to add music or voiceover later. Include it when the narrative sound matters to the creative. This flexibility means you're not forced into an audio decision at generation time. You can adjust later in the edit.

How to use FLUX.3 in Craze

1. Start a project and describe the video or upload a single first-frame image. If you have video to extend, add that.
2. Say you want FLUX.3. Craze runs the model when you ask for it by name. If you don't name one, Craze shows compatible models with their costs.
3. Choose your aspect ratio and whether to include sound.
4. Craze generates the clip.
5. Review in the editor. Regenerate shots that miss or move on to editing.

FLUX.3 on Craze also runs video extension, where it generates 5 to 15-second continuations of your source clips. When you ask for it by name, Craze uses FLUX.3 for those shots.

FLUX.3 capabilities

FLUX.3 supports text-to-video, image-to-video, and video extension. You describe a scene and it generates from scratch. You provide an image and it animates it while preserving the composition and style. You provide video and it extends it with optional audio that matches your source material.

The model handles open-ended creative directions, complex scenes with multiple subjects, and technical precision. It generates at 720p or 1080p, writes to natural physics, and produces consistent motion across the full 20-second duration. Reference images anchor style and composition, and FLUX.3 holds that direction throughout.

FLUX.3 is the first model in the Flux family, built on a multimodal architecture shared with robotic vision and action planning. On Craze, you don't interact with that complexity. You just describe what you want, name the model, and Craze handles the integration.

FLUX.3 pricing

You pay per second of video. Extension starts at $0.432 per second of added video and has a different rate from new generation. Pricing varies by resolution; optional sound does not change the rate. Use the calculator for your task.

Video extension is also billed per second of output. Extension adds 5 to 15 seconds; text- and image-to-video can run up to 20 seconds.

Who FLUX.3 is for

Content creators making for multiple platforms

One shoot, six aspect ratios. FLUX.3 handles vertical TikTok, square Instagram, and landscape YouTube all from the same model without format switching. For multi-platform campaigns, this is an efficiency win.

Long-form narrative and storytelling

Twenty seconds is enough for a scene, a beat, or a narrative moment. Use FLUX.3 to build sequences where each clip carries full context. For storytelling that needs longer takes without cuts, FLUX.3's 20-second window is a practical advantage.

Projects that need flexible audio control

Sometimes you want sound, sometimes you don't. FLUX.3 lets you decide per clip without changing the generation model. This flexibility is useful for projects where some clips get voiceover and others get music.

Batch production and high-volume work

When you're making many clips for a campaign or series, FLUX.3's aspect ratio flexibility and 20-second length reduce the number of total generations you need. One model handles the variety.

FLUX.3 vs other models

FLUX.3 generates clips up to 20 seconds and supports the widest array of aspect ratios. For 4K resolution and broadcast work, see Veo 3.1. For speed-optimized generation at 1080p, see Grok Imagine 1.5. For character consistency across multiple shots, see Gemini Omni Flash. For other long-clip options at native 4K, see LTX-2.5.