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    FLUX 3

    Video with sound that picks up where your footage stops.

    FLUX 3 generates 5 to 20 second clips at 720p or 1080p with sound written in the same pass. Its standout mode continues an mp4 you supply from its final frames, and the result can be fed back in, so a sequence grows one run at a time. It also works from a prompt, one image, a first and last frame, or a storyboard of up to 10 stills, and a Draft mode gives a fast 720p preview.

    Long takesVideo with soundFast drafts
    Try it in KubeezFull model page

    Best for

    • Extending a short ad to fill a longer slot
    • Storyboarded sequences where you direct the beats
    • B-roll and transitions that need a few more seconds
    • Product demos that keep the same product, light and table

    Strengths

    • Continues a clip you supply: mp4, up to 15 seconds and 50 MB
    • Storyboard mode turns 3 to 10 stills into the beats of one clip
    • Native sound that you can switch off
    • Draft mode for fast 720p previews before a full quality run

    Limits

    • One run is 5 to 20 seconds. Longer pieces mean chaining runs.
    • Images and a video to continue cannot be sent in the same request.
    • Draft runs render at 720p only.
    • Prompts are capped at 5,000 characters.

    Practical tips

    1. 01

      Trim a long recording down to the tail you want continued before uploading.

    2. 02

      Settle the prompt on a Draft run, then rerun the same setup at full quality.

    3. 03

      In storyboard mode, order the stills as the beats should play: the first opens, the last closes.

    4. 04

      Ask for big changes in the prompt rather than hoping the continuation invents them.

    Sample prompts

    Copy one, paste it into Kubeez and change the details to fit your brief.

    Continue the shot: the camera keeps tracking the runner along the beach as the sun breaks through the clouds, she slows to a walk and looks out at the waves. Surf, wind, footsteps in wet sand.

    Storyboard: the product box on a desk, the lid lifting, the device raised out, the screen glowing on. Smooth motion between each beat, clean studio light, a soft click and hum.

    Where it ranks

    Position among the models available on Kubeez, from public blind votes, or the Kubeez team's own ranking for video editing and speech.

    FLUX 3

    Video with sound that picks up where your footage stops.

    Try it in KubeezFull model page

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