Mask shape prototyping
Test how tight or loose masks should be for your subject.
Fast fill experiments with FLUX.1 Fill Dev
Dev-tier inpainting and outpainting for testing masks and prompts before Pro-quality seamless fills.
Image editing
Image*
5
What it is good for
Fast fill experiments with FLUX.1 Fill Dev
Dev-tier inpainting and outpainting for testing masks and prompts before Pro-quality seamless fills.
Banner crop exploration
Preview outpainting strategies for new aspect ratios.
Removal comp tests
Validate object removal prompts cheaply before Pro delivery.
Key capabilities
Why creators pick FLUX.1 Fill Dev
Mask workflow
Same inpainting/outpainting paradigm as Pro at Dev cost and tunability.
Quick fill previews
Iterate mask shapes and prompts before a final Pro pass.
Outpaint tests
Try small extensions to learn how much context Fill Dev preserves.
Tunable steps
Find settings that blend masked regions without obvious seams.
Tooling friendly
Integrate into editors that export masks programmatically.
How to get a strong result
Tips for better results
Start with the subject, then add lighting, style, and anything that must stay the same. Upload a reference whenever you want a more controlled edit.
- 1
Start with small masks
Smaller regions blend more reliably while learning Fill Dev behavior.
- 2
Upgrade for seamless delivery
Use Fill Pro when clients will inspect edges closely.
- 3
Match prompt to surrounding scene
Reference lighting direction and materials from the source image.
- 4
Save successful mask templates
Reuse mask strategies for repeating product or portrait edits.
Series compare
Compare FLUX.1 Fill versions
Inpainting and outpainting tiers compared — Pro for seamless delivery, Dev for mask experiments.
| Feature | FLUX.1 Fill Pro Open page | FLUX.1 Fill DevCurrent You’re viewing this model |
|---|---|---|
| Best for | Delivery inpainting/outpainting | Fill and mask experiments |
| Speed | Moderate | Fast |
| Inpainting | Excellent | Good (draft) |
| Outpainting | Strong | Good |
| Mask support | Full mask workflow | Full mask workflow |
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