# FLUX 3 Image

Black Forest Labs' FLUX 3 Image: generate and edit up to 4K, with text in many languages.

Last updated: 2026-10-05

**Key facts**

- FLUX 3 Image is Black Forest Labs' newest image model, released on 1 October 2026; one model both generates and edits.
- FLUX 3 Image makes 1K, 2K or 4K images in Sloosh, with 2K as the default.
- FLUX 3 Image takes up to 10 reference images in Sloosh and prompts up to 5,000 characters.
- FLUX 3 Image offers 11 aspect ratios in Sloosh, from 21:9 wide to 9:21 tall.

Web page: https://sloosh.ai/docs/flux-3-image

FLUX 3 Image is Black Forest Labs' newest model. One model both generates and edits, takes up to 10 references and outputs up to 4K. A short prompt is fine: it expands it into a detailed description before it draws.

## When to use it

- High-resolution product and lifestyle images, up to 4K.
- Text on the image, including non-Latin scripts.
- Step-by-step edits: send a result back with one more change.

## How to prompt it

- A useful order: subject, location, style, camera, lighting, colours, extra elements. Use natural sentences for how things relate.
- Name only what is visible. Words like "beautiful" or "masterpiece" add nothing.
- Put exact text in double quotes with the capitals you want, and say where it goes and how it looks.
- Give colours as hex codes, each tied to one object.
- Name references by position ("image 1", "image 2") and say what each supplies.
- There's no negative prompt: describe what should fill the space, such as "an empty promenade".
- 4K takes longer. Judge a few results: two runs of the same prompt differ.

## Example

Text only: a product photo with the layout, light and printed text all set in the prompt.

![A matte terracotta mug printed with SLOW MORNINGS on an oak table in morning light, below a plain warm-white wall](https://sloosh.ai/docs/m-flux-3-image.webp)

_4:5, 2K, Enhance off._

**Prompt**

```text
Commercial product photograph for a 4:5 social post: a matte terracotta ceramic coffee mug on a pale oak table, morning window light from the left, soft shadow to the right. The mug sits in the lower third; the top of the frame is a plain warm-white wall. Printed on the mug in small black sans-serif capitals: "SLOW MORNINGS". Shot on a 50mm lens, shallow depth of field.
```

## Settings in Sloosh

- Aspect ratio: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 or 9:21.
- Resolution: 1K, 2K or 4K.
- References: up to 10 images.
- Prompt: up to 5,000 characters.

Open it in [Image](https://sloosh.ai/studio/image) and pick FLUX 3 Image in the model chip. The Generate button shows the cost first.

## Frequently asked questions

### What is FLUX 3 Image best for?

FLUX 3 Image is best for high-resolution product and lifestyle images up to 4K, text on the image including non-Latin scripts, and step-by-step edits where you send a result back with one more change. A short prompt works, because FLUX 3 Image expands it into a detailed description before it draws.

### FLUX 3 Image vs Flux 2 Pro: which should I use?

Use FLUX 3 Image when you need 2K or 4K output, up to 10 references or text in other languages. Use [Flux 2 Pro](https://sloosh.ai/docs/flux-2-pro.md) for photoreal 1K scenes with exact hex colours, or when you want a seed to repeat a result: FLUX 3 Image has no seed in Sloosh.

### Can FLUX 3 Image write text in other languages?

Yes. FLUX 3 Image renders text in many languages, and Black Forest Labs' own examples include Japanese and French posters. Quote non-Latin text directly in its own script, in double quotes with the exact capitals and punctuation, and say where it goes. Proofread small print on every result.

### Does FLUX 3 Image support negative prompts?

No. FLUX 3 Image has no negative prompt, so describe what should fill the space instead: "an empty promenade", not "no crowds". In an edit, removing something is a plain instruction, such as "Remove the cat from the sofa".

### Why does the same FLUX 3 Image prompt give different results?

FLUX 3 Image has no seed in Sloosh, so two runs of one prompt differ. Changing the resolution also regenerates the image, so the composition can move between 2K and 4K. Judge a few results before you pick one, and expect 4K to take longer.

## Sources

- [BFL: FLUX 3 Image overview](https://docs.bfl.ml/flux_3/flux3_image_overview)
- [BFL: prompting basics](https://docs.bfl.ml/guides/prompting_unified_basics)
- [BFL: style, aesthetics and text](https://docs.bfl.ml/guides/prompting_unified_style)