# FLUX.1 Dev AI Image Generator

> The tunable FLUX.1 development checkpoint for prompt experiments, seeded studies and controllable rendering.

Canonical URL: https://allimageai.com/models/flux-1-dev/

Website: All Image AI

Language: English

FLUX.1 Dev is the controllable development checkpoint in the original FLUX.1 family. It exposes inference steps and guidance for reproducible prompt studies and custom art direction, while acceleration stays on the standard tier so cost is predictable.

## Model details

- Developer: Black Forest Labs
- Status on All Image AI: Active
- Last verified: 2026-08-25
- Maximum output: 2K
- Modes: Text to Image
- Reference images: not supported
- Resolutions: 1K, 2K
- Aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9

## Best for

- Seeded prompt studies
- Custom guidance experiments
- Illustration and concept art
- Open-model workflows

## How to use

1. Describe subject, material, light and camera treatment.
2. Start at 1K.
3. Fix the seed before comparing parameters.
4. Render only the selected direction at 2K.

## Settings explained

### Guidance

Start at 3.5 and raise it only when important prompt constraints are missed.

### Steps

Twenty-eight is the documented default; fewer steps trade detail for speed.

## Prompt examples

### Material study

> Brushed titanium headphones on dark volcanic stone, precise specular highlights, single strip light, premium product photograph

### Cinematic scene

> Rainy tram stop at midnight, wet asphalt reflections, one warm practical light, restrained teal film grade, 35mm lens

## Limitations

- Slower than distilled FLUX routes
- Text-to-image only
- Too much guidance can make output synthetic

## Pricing and credits

Credits for one image at default quality and mode. Resolution, quality, reference inputs, edit mode and output count can change the total. Check the Generate button before submitting.

| Resolution | Credits / image |
| --- | --- |
| 1K | 2 |
| 2K | 8 |

Failed generations cost 0 credits. Catalog availability does not guarantee runtime availability; the workspace reports whether the selected model can run.

[Credit plans](https://allimageai.com/pricing.md)

## Test results

Testing in progress. No verified benchmark scores have been published for this model.

## Commercial use and image handling

Commercial use is subject to Black Forest Labs' model licence and the selected service terms.

Uploads are processed by the configured inference service. You can delete a generation from your history.

## Frequently asked questions

### How is FLUX.1 Dev different from FLUX1.1 Pro Ultra?

Dev exposes steps and guidance for experimentation; Pro is the managed production-quality endpoint.

### Can it edit an uploaded image?

This page exposes only the exact verified text-to-image operation.

## Release history and sources

August 1, 2024 — Model announced · open weights

This date applies to the event shown. Later API access, weights and availability on All Image AI may have different dates.

- [bfl.ai](https://bfl.ai/blog/24-08-01-bfl)

[Event evidence on the timeline](https://allimageai.com/timeline/#event-flux-1-dev)

## Other versions

- [FLUX.2 Max](https://allimageai.com/models/flux-2-max.md): Typography · 2K
- [FLUX.2 Flex](https://allimageai.com/models/flux-2-flex.md): Adjustable steps · 2K
- [FLUX.2 Flash](https://allimageai.com/models/flux-2-flash.md): 4 references · 2K
- [FLUX.2 Turbo](https://allimageai.com/models/flux-2-turbo.md): Low-cost · 2K
- [FLUX.2 Klein 4B](https://allimageai.com/models/flux-2-klein-4b.md): 4–8 steps · 2K
- [FLUX.1 Kontext Max](https://allimageai.com/models/flux-kontext-max.md): Premium edit · 1K
- [FLUX.1 Kontext Pro](https://allimageai.com/models/flux-kontext-pro.md): Iterative edit · 1K
- [FLUX1.1 Pro Ultra](https://allimageai.com/models/flux-1-1-pro-ultra.md): Raw mode · 2K
- [FLUX1.1 Pro](https://allimageai.com/models/flux-1-1-pro.md): Photographic · 2K
- [FLUX.1 Schnell](https://allimageai.com/models/flux-1-schnell.md): 1 credit · 1K
- [FLUX.2](https://allimageai.com/models/flux-2.md): Recommended · 4MP
- [FLUX.2 Klein](https://allimageai.com/models/flux-2-klein.md): Fastest · 1K