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How to Use FLUX 3 Video

Make a FLUX 3 Video video in the CheaperGen Studio — no code, no install, no Black Forest Labs account. Pick a mode, write one clear prompt, set the resolution and length and press Generate. A test costs $0.79; developers can follow the API tutorial instead.

Modes
2
Text → Video · Image → Video
Test clip
$0.79
5 s · 720p
Length
5–20 s
up to 720p
Failed runs
$0
refunded automatically
Create with FLUX 3 VideoGet API keyAPI docs

Prompt builder

Build a FLUX 3 Video prompt

Fill in the parts of the shot; the prompt assembles itself. Send it to the playground below and run it — the steps after it explain each part.

Your FLUX 3 Video prompt

Fill in a few boxes — or start from the example — and the prompt appears here.

Try it

Try FLUX 3 Video here

Runs on your balance at the price on the button; failed runs are refunded. Results are saved to your account.

Open the full-screen Studio

Before you start

Which FLUX 3 Video mode to use

FLUX 3 Video has 2 modes. Pick by what you already have.

FLUX 3 Video modes
ModeYou give itBest forFrom
Text → VideoA promptIdeas from scratch: scenes, b-roll, concepts and storyboards.$0.1564/s
Image → VideoA first frame, optionally a last frame, and a promptBringing a picture you already have to life: a product shot, a character, an artwork. With a last frame: transitions and loops.$0.1564/s

Step by step

How to use FLUX 3 Video in 6 steps

  1. 1

    Open FLUX 3 Video in the Studio

    Open the Studio (it opens with FLUX 3 Video selected), or choose the Video tab and pick FLUX 3 Video in the model menu. Sign in with Google or your email; you pay per generation from prepaid credits.

  2. 2

    Choose what to make

    • Text → Video — a prompt.
    • Image → Video — a first frame, optionally a last frame, and a prompt. Add it under “First frame” (and “Last frame” for a transition).
  3. 3

    Write the prompt

    One shot per prompt works best. Cover these, in plain sentences:

    • Subject. Who or what is on screen, with the details that must stay consistent: age, clothing, materials, colours.
    • Action. One clear action in the present tense. For clips up to 20 s, describe a short sequence of beats.
    • Camera. Shot size and movement: close-up, wide, dolly-in, orbit, handheld, drone.
    • Scene and light. Location, time of day, and where the light comes from.
    • Style. Lens, film look, colour grade or animation style.
    • Sound. FLUX 3 Video generates synchronized audio with the clip, so name the ambience, effects or lines of dialogue you want.

    More structure and examples: the FLUX 3 Video prompt guide.

  4. 4

    Set the options

    The settings sit under the prompt; rarely needed ones are behind ⋯. What each does — and to the price — is in the table below.

  5. 5

    Generate

    The exact price is shown before you run: press Generate (or ⌘/Ctrl + Enter). The amount is held from your balance and refunded in full if the generation fails.

  6. 6

    Download and iterate

    Results appear above the prompt; download them from there. Change one thing per try — the prompt, the camera move or a setting — so you know what helped. Compare runs the same prompt on several models side by side, and Code shows the same request for the API.

Settings

FLUX 3 Video settings explained

For Text → Video; the other modes add their inputs (frames, references or images to edit). Prices are per second.

FLUX 3 Video settings
SettingChoicesDefaultWhat it doesPrice
Aspect ratio16:9, 9:16, 1:1, 4:3, 3:4, 21:9, 2:116:9Output image shape.Changes the price
Duration5–20 s5 sLength of the generated clip in seconds (5–20s). You pay per second.Price scales with length
Generate audioOn / offOnGenerate synchronized sound, ambience and dialogue. No extra cost.Included in the price

Every tier and a calculator: FLUX 3 Video API Pricing.

Worked example

A first prompt to try

Text → Video with the default settings. Paste it into the Studio and change one thing at a time.

“A lighthouse keeper climbs the spiral stairs with a lantern as a storm hits the windows, thunder and rain”

Aspect ratio: 16:9 · Duration: 5 s · Generate audio: On

$0.79$0.85 for this clip

Try it in the Studio

Avoid these

Common FLUX 3 Video mistakes

Expecting one long take

One generation is up to 20 seconds (5–20 s). Plan longer pieces as several shots, and keep the subject consistent with the same first frame in each.

Several actions in one prompt

Give each clip one clear action and one camera move. A list of events in one prompt usually gets merged or skipped.

Describing what you don't want

Prompts work better when they describe what should be on screen. "No blur" or "no extra fingers" can pull the result towards the very thing you name.

FAQ

How to use FLUX 3 Video: questions

Yes. Open it in the CheaperGen Studio, pick a mode, write a prompt and press Generate. No code, no install and no Black Forest Labs account.

There is no free tier, and no subscription is needed either: you pay per clip, from $0.79 for a short 720p test clip — 8% below the fal API price. Credits are prepaid and failed generations are refunded. Every price is on the FLUX 3 Video pricing page.

Yes: as the first frame of an image-to-video clip. Upload them in the Studio, or pass their URLs in the API.

Write one clear shot per prompt — subject, action, setting, camera and light — and change one thing per try. The FLUX 3 Video prompt guide has a structure and examples that work.

Yes. The same model and price are on the API — see how to use the FLUX 3 Video API — and on our MCP server, so agents like Claude can generate for you (MCP setup).

Nothing is charged. The price is held when you press Generate and refunded in full if the generation fails or you cancel it while it is queued.

It depends on quality, speed and price; the FLUX API page compares all 9 side by side.

FLUX 3 Video is developed by Black Forest Labs. CheaperGen provides API access and does not own the model. Trademarks belong to their respective owners.