FLUX 3 Max Generator & Cost Calculator (Bring Your Own fal Key)

Unofficial guide. Not affiliated with Black Forest Labs or fal.

Last verified: 21 October 2026

Unofficial tool. Not affiliated with Black Forest Labs or fal. Generation runs on your own fal account – you pay fal’s rates, we never see or store your key on our server.

Generate with FLUX 3 Max (bring your own fal key)

Enter a prompt, add your own fal API key, and this page sends the request straight to fal from your browser. Your key is stored only in your browser’s local storage on your own device, and is sent only to fal – never to our server. Generation is billed to your own fal account at fal’s rates, so there is no free generation on this page: your key, your fal account, your bill.

Your fal API key:

Save key in this browser Forget key
Your key stays in your browser and is sent only to fal.

Prompt:

Image URL (optional – leave empty for text-to-video, add one for image-to-video):

Duration: 10 seconds (clips run 5-20):

Resolution:
720p1080p (upscaled)

Aspect ratio:
Auto (16:9 for text prompts, follows the first image otherwise)21:92:116:94:31:13:49:16

Generate native audio (audio is on by default in FLUX 3 Max)

Estimated cost for this clip: $0.43

Generate video

Your recent clips (kept in this browser only)

No clips logged yet.

Clear clip log

Cost calculator

Work out what a FLUX 3 Max generation will cost before you run it. Enter the clip length, the resolution and how many clips you plan to generate; the calculator shows the total at the current promotional rate and at list price. Rates used: 720p is $0.0425 per second at promo and $0.17 at list; 1080p (upscaled) is $0.0725 promo and $0.29 list. The promotional rate ends on 7 November 2026.

Clip duration (seconds, clips run 5-20):

Resolution:
720p1080p (upscaled)

Number of clips / iterations:

Total at promo rate: $0.43

Total at list price: $1.70

Bring your own fal key: how generation works

The generator above sends your request straight to fal from your browser, using the fal API key you enter. Generation runs on your own fal account, with your own fal API key, and is billed to that account at fal's rates. That means there is no markup from us - and no free generation either. This site never pays for visitors' generations, so there is no free-credit promise here: your key, your fal account, your bill.

To get a fal key and generate:

1. Create a fal account and sign in at fal.
2. Open the API keys section of your fal dashboard and create a new API key.
3. Paste the key into the generator above and save it in your browser - it stays on your device and is sent only to fal.
4. Your fal account is billed per second of video generated: at the promotional rate until 7 November 2026, and at list price after that.

Background on the model: FLUX 3 Max Explained. Full rate tables: FLUX 3 Max Pricing: Cost Per Clip.

Last verified: 21 October 2026

Unofficial guide. Not affiliated with Black Forest Labs or fal.