FLUX 3 Max Text to Video: Turn a Prompt into a 20-Second Video
FLUX 3 Max from Black Forest Labs generates complete video clips from a single text prompt — up to 20 seconds long, in 720p or 1080p, with synchronized audio baked in. It is a text to video model built for finished shots, not silent loops. Choose your duration, resolution, aspect ratio and audio in one panel, then let FLUX 3 Max handle framing, motion and sound. A single FLUX 3 Max run can carry a full scene, from establishing shot to closing beat.
FLUX 3 Max Text-to-Video Generator
Write a prompt for FLUX 3 Max, the AI video generator, then pick a duration between 5 and 20 seconds, choose 720p or 1080p, and generate a video with native audio. Credits are priced per second of output, shown live before you generate.
No videos generated
What Is FLUX 3 Max Text to Video?
As an AI video generator, FLUX 3 Max is Black Forest Labs' text to video model, accessed through the fal queue API. Unlike earlier text-to-video models that stop at four or eight seconds, FLUX 3 Max produces clips from 5 to 20 seconds in one-second increments, so a single generation can carry a full scene instead of a fragment. It renders at 720p by default with optional 1080p upscaling, generates synchronized audio alongside the picture, and supports eight aspect ratios from ultrawide 21:9 to vertical 9:16. A reasoning-level control lets FLUX 3 Max think harder about complex prompts before rendering.
Clips up to 20 Seconds
FLUX 3 Max lets you choose a duration from 5 to 20 seconds in one-second steps. Longer clips hold camera moves, dialogue pacing and scene beats that four-second generations cut off. For social posts, a 10 to 15 second clip usually lands in the sweet spot between cost and completeness.
Native Synchronized Audio
FLUX 3 Max generates audio together with the video rather than adding it afterwards, so footsteps, ambience and on-screen action stay in sync. You can switch audio off when you plan to dub the clip or score it yourself, which also removes any risk of mismatched sound.
720p and 1080p Output
Every FLUX 3 Max generation returns MP4 video at 720p, with an optional 1080p upscale for delivery to clients or large-screen playback. Resolution changes the price per second, and the credit cost is shown before you confirm, so you can generate drafts cheaply and re-render winners in full quality.
Eight Aspect Ratios
FLUX 3 Max frames eight ratios — auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4 and 9:16 — for the chosen output instead of cropping a fixed 16:9 render, which keeps subjects centred whether the target is a cinema bar, a square feed post or a vertical story.
Key Features of FLUX 3 Max
FLUX 3 Max is an AI video generator built for producing finished-looking clips rather than silent loops. These are the capabilities that matter when you move from experiments to a content calendar.
Prompt-Faithful Direction
FLUX 3 Max follows multi-part prompts that describe subject, action, camera movement, lighting and mood at once. Naming the shot — close-up, dolly in, golden hour — measurably changes the result, so a well-structured prompt can replace several retries.
Reasoning-Level Control
A high reasoning setting lets FLUX 3 Max work through complex spatial or narrative instructions before rendering, which pays off for prompts with several interacting subjects. Simpler shots benefit from the faster setting when you are iterating quickly.
Consistent Motion and Framing
Longer clips are where most text-to-video models drift, warp or lose the subject. FLUX 3 Max keeps composition and identity stable across the full 20-second window, so camera moves and character action stay coherent to the last frame.
Audio-Enabled by Default
FLUX 3 Max generates audio by default, which means the first result is already a shareable clip rather than a silent asset waiting for a sound pass. Turn it off when you want a clean plate for voice-over or music.
Built for Iteration
With FLUX 3 Max, drafts at 5 seconds in 720p cost a fraction of a full 20-second 1080p render, so the practical workflow is to explore cheaply and upscale only the take you keep. The credit panel updates with each parameter change, so cost is never a surprise.
Standard MP4 Delivery
Output is a standard MP4 file you can download directly from the page and drop into any editor, social scheduler or ad platform without transcoding first.
How to Generate a Video with FLUX 3 Max
Four text to video steps from an idea to a downloadable clip with FLUX 3 Max. No timeline, keyframes or storyboard required.
1. Describe the Shot
Write what FLUX 3 Max should show on screen: the subject, what it does, how the camera behaves, and the light. A prompt like "a red fox trotting through snowy pine forest, slow tracking shot, soft morning light, shallow depth of field" gives FLUX 3 Max enough structure to produce a usable take on the first attempt.
2. Set Duration, Resolution and Ratio
Start at 5 seconds and 720p while you iterate. Once a FLUX 3 Max take works, move to 10 to 20 seconds for a complete scene and switch to 1080p for final delivery. Choose the aspect ratio that matches where the clip will be published — 16:9 for web and YouTube, 9:16 for vertical feeds, 1:1 for square placements.
3. Decide on Audio
Tell FLUX 3 Max to leave audio on for ambience and action sound that matches the picture. Turn it off when you plan to add your own voice-over, licensed music or sound design — a silent render gives you a clean base to lay sound over later.
4. Generate, Review, Download
Submit the prompt and FLUX 3 Max runs the task on fal's queue. The page polls for progress and shows the finished video in the preview panel, where you can play it back and download the MP4. Credits are charged per second of output and refunded automatically if the generation fails.
What People Make with FLUX 3 Max
FLUX 3 Max raises the ceiling to 20 seconds with native audio, opening up formats that shorter AI video generators cannot serve.
Short-Form Social Video
FLUX 3 Max renders vertical 9:16 clips of 10 to 15 seconds that fit Reels, Shorts and TikTok natively, with generated audio giving each post a finished feel without a separate editing pass. Teams produce several variations per concept and test them against each other.
Product and Brand Spots
A 16:9 or 21:9 FLUX 3 Max shot of a product in motion — steam off a cup, fabric in wind, a device rotating in light — gives marketing teams a spot-quality background plate without a studio shoot. Export at 1080p for landing pages and paid placements.
Storyboarding and Previsualisation
Directors and editors use FLUX 3 Max to turn beats from a script into moving shots to communicate intent before a shoot. Because drafting at 5 seconds is cheap, an entire sequence can be blocked out in minutes and reviewed as video instead of static frames.
Atmosphere and B-Roll
Generated loops of weather, city traffic, drifting clouds or abstract light make serviceable B-roll for longer edits. Generate a handful of establishing shots, keep the ones that cut well, and skip stock licensing entirely.
Frequently Asked Questions
What to know before you spend credits on a FLUX 3 Max generation.
Generate Your First FLUX 3 Max Video
Describe a shot, pick a duration and let FLUX 3 Max render a clip with motion, framing and audio in one pass. Start with FLUX 3 Max at 5 seconds and 720p, then upscale the take you keep. It is the fastest route from a prompt to a publishable clip.