# FLUX 2: what FLUX.2 pro, flex, max, dev and klein can do — versions, pricing and prompts

> FLUX 2 (FLUX.2) is a family of image models from the German lab Black Forest Labs, released on November 25, 2025. It generates and edits images up to 4 MP, takes up to 10 references, and renders text, UIs and exact hex colors. Versions: pro, flex and max through the API, plus dev and the compact klein with open weights. FLUX 2 is available in the AI2Face generator.

Developer: Black Forest Labs · Released: 2025-11-25 · Updated 2026-10-27
URL: https://ai2face.com/models/flux-2

## Key facts

| | |
|---|---|
| Developer | Black Forest Labs (Germany) |
| Release date | November 25, 2025; FLUX.2 klein in early 2026 |
| Versions | pro, flex, max — API; dev and klein (4B, 9B) — open weights |
| What it does | Generates and edits images in one model |
| Resolution | Up to 4 MP, any aspect ratio |
| References | Up to 10 (pro and max in the API — up to 8; klein — up to 4) |
| Highlights | Hex color control, text and UIs, web search in max |
| API price | pro — $0.03 per MP, flex — $0.05, max — $0.07; klein — from $0.014 per image |
| In AI2Face | Yes, in the generator |

## What is FLUX 2

FLUX.2 is the second generation of image models from the German lab Black Forest Labs (BFL). It launched on November 25, 2025, and was the first to combine generation and editing in a single architecture: a 24-billion-parameter vision-language model understands the prompt and the images, and a rectified flow transformer renders the result. For the whole FLUX family, see the [FLUX](/models/flux) overview.

The generation has five versions:

- **FLUX.2 [pro]** — the production workhorse, generating in under 10 seconds;
- **FLUX.2 [flex]** — with manual control over step count (up to 50) and guidance, the strongest at typography;
- **FLUX.2 [max]** — top quality plus web search for up-to-date details;
- **FLUX.2 [dev]** — 32-billion-parameter open weights for non-commercial use;
- **FLUX.2 [klein]** — compact 4B and 9B models released in early 2026, the fastest in the family.

Since July 2026, BFL has a next generation: [FLUX 3](/models/flux-3). FLUX.2 remains in the API and is still BFL's most popular open model for running locally.

## What FLUX 2 can do

**Up to 4 MP at any aspect ratio.** Every version generates and edits images up to 4 megapixels — roughly 2048 × 2048 for a square.

**Up to 10 references.** A character, a product and a style from different images in one scene. In the API, pro and max are limited to 8 images, the BFL playground allows 10, and klein takes 4.

**Hex color control.** You can specify an exact color: "a #E3B23C glaze on a #2F3E46 backdrop." For brand assets and product shots, that saves rounds of edits.

![Three identical ceramic mugs in a row on a white table: red, teal and orange](https://ai2face.com/_astro/hex-mugs.DEVEx3gs_2gJtbG.jpg "Colors from hex codes in the prompt: #D7263D, #1B998B and #F46036. Made with Nano Banana Pro from a FLUX.2-style prompt — FLUX 2 takes colors the same way")

**Text, infographics and UIs.** BFL says complex typography, memes, infographics and UI mockups with small text now work reliably in production. flex handles text best.

**Photorealism.** Cleaner detail, sharper textures, steadier lighting — BFL singles out product and photo work.

**Web search in max.** FLUX.2 max pulls current information from the web straight into the image — for example, the look of a building or a product.

## FLUX 2 pro vs. flex vs. max vs. dev vs. klein

| | pro | flex | max | dev | klein 4B / 9B |
|---|---|---|---|---|---|
| Access | API | API | API | open weights | open weights and API |
| Best for | production volume | text, fine control | top quality | running locally | speed, real time |
| API price | $0.03 per MP, edits $0.045 | $0.05 per MP, edits $0.10 | $0.07 per MP | free, non-commercial | from $0.014 / $0.015 |
| References | 8 in the API | — | 8 in the API | — | up to 4 |
| Notable | under 10 s | up to 50 steps, guidance | web search | 32B parameters | sub-second generation |
| License | — | — | — | non-commercial | 4B — Apache 2.0, 9B — non-commercial |

Klein 4B fits in about 13 GB of VRAM — an RTX 3090 or 4070 and up. The base klein 9B needs about 29 GB and an RTX 4090. Klein 9B is a 9B flow model with an 8B Qwen3 text embedder, distilled down to 4 inference steps.

## What FLUX 2 is good for

- **Product photography and catalogs** with exact brand colors via hex.
- **Series with one product or character** — up to 10 references.
- **Posters, memes and infographics** — best on flex.
- **UI mockups** for decks and prototypes.
- **Local generation and LoRA training** — dev and klein on your own GPU.

## FLUX 2 vs. alternatives

| | FLUX 2 | [FLUX 3 Image](/models/flux-3) | [Nano Banana Pro](/models/nano-banana-pro) | [Qwen Image](/models/qwen-image) |
|---|---|---|---|---|
| Developer | Black Forest Labs | Black Forest Labs | Google DeepMind | Alibaba |
| Max size | 4 MP | 4K | 4K | 2K (2048 × 2048) |
| References | up to 10 | up to 10 | up to 14 | 1–10 |
| Open weights | dev, klein | Klein | no | 1.x, Layered, 2.1 |
| Hex colors | yes | yes | no | — |
| In AI2Face | yes | yes | yes | yes |

FLUX 2 is the best choice when you need an open model or exact hex colors. FLUX 3 Image adds 4K and box-based editing, and Nano Banana Pro is best at likeness from photos of people.

## How to write prompts for FLUX 2

1. **Order by importance:** main subject → action → style → context. Put what matters most at the start.
2. **Use hex codes for colors:** "exactly #E3B23C." Use separate codes for the background and the object.
3. **Quote text** and give it a role: headline, subheading, caption. For complex typography, use flex.
4. **Number references and give them roles:** "the product from image 1, the background from image 2."
5. **Describe complex scenes in parts:** BFL says FLUX.2 follows structured, multi-part prompts better than earlier versions.

The full prompts for each image are in the gallery.

## How to use FLUX 2 in AI2Face

FLUX 2 is in the AI2Face generator next to [FLUX 3](/models/flux-3), [Nano Banana Pro](/models/nano-banana-pro) and [GPT Image 2.5](/models/gpt-image-2-5).

1. Sign up — new accounts get starter credits.
2. Open the generator and pick FLUX 2.
3. Write a prompt, and upload references if needed.
4. The credit cost is shown before you start. Credits don't expire.

The images on this page were made in AI2Face with Nano Banana Pro from FLUX.2-style prompts — they show how such prompts work, not FLUX 2's own output quality.

## Limitations

- **4 MP is the ceiling.** For 4K, use FLUX 3 Image or Nano Banana Pro.
- **Reference limit in the API.** pro and max take 8 images, not 10.
- **Open-weight licenses.** dev and klein 9B are non-commercial only; commercial use needs a separate BFL license. Only klein 4B is free to use.
- **Hardware for local runs.** Even the compact klein 4B needs about 13 GB of VRAM.
- **No longer the newest.** In BFL's internal tests, the compact FLUX 3 Image Klein beats FLUX.2 pro.

## Bottom line

FLUX 2 is a workhorse for product shots, brand colors and posters: hex codes, 10 references and 4 MP cover most commercial jobs, and dev and klein run on your own hardware. For 4K and precise box-based edits, move to [FLUX 3](/models/flux-3). For portraits and facial likeness from photos, compare the result with [Nano Banana Pro](/models/nano-banana-pro) in the same AI2Face generator.

## Generation examples

- A glossy mustard-yellow vase on a matching plinth against a dark blue-grey backdrop
  Prompt: `Studio product photo of a minimalist ceramic vase with a glossy glaze in exactly the color #E3B23C, standing on a matching plinth in front of a seamless backdrop in exactly the color #2F3E46, soft key light, subtle shadow, premium catalog look, no text, no logos`
- A young woman with long braids in a denim jacket on a wet street at night with neon reflections
  Prompt: `Candid street portrait of a 28-year-old woman with long box braids in an oversized denim jacket on a narrow rainy side street at night, neon reflections on wet pavement, signs blurred and unreadable, 50mm lens, natural skin texture, photorealistic, no text, no logos`
- A Swiss-style BLUE NOTES typographic poster: a blue grid and an orange saxophone
  Prompt: `Swiss-style typographic poster for a jazz festival. Large headline: 'BLUE NOTES'. Subheading: 'Open-air jazz · 12–14 July'. Bottom line: 'Riverside Park'. Strict modular grid, deep cobalt blue and off-white palette, a single saxophone silhouette in orange. All text exactly as written, spelled correctly, no other text, no logos.`
- A My Home smart-home dashboard on a tablet: room temperatures, lights and an energy chart
  Prompt: `Smart-home app dashboard UI on a tablet screen, flat design, dark theme. Title: 'My Home'. Cards: 'Living room 21.5°C', 'Bedroom 19°C', 'Lights 3 on', 'Energy today 7.2 kWh'. A small line chart of energy use by hour. Rounded cards, teal accents, crisp sans-serif. All text exactly as written, spelled correctly, no other text, no logos.`

## FAQ

### What is FLUX 2?

A family of image models from Black Forest Labs, released on November 25, 2025. A single model both generates and edits images, takes up to 10 references and works at up to 4 megapixels.

### How are FLUX.2 pro, flex, max, dev and klein different?

pro is the fast production model, flex lets you tune steps and guidance and is the strongest at typography, and max offers top quality plus web search. dev is a 32-billion-parameter open-weight model, and klein is the compact, fastest version, also open.

### Can I download FLUX 2?

Partly. FLUX.2 dev and FLUX.2 klein are on Hugging Face. Klein 4B is Apache 2.0 and runs on a GPU with about 13 GB of memory; dev and klein 9B are under a non-commercial license.

### What resolution does FLUX 2 support?

Up to 4 megapixels in every version, with any aspect ratio.

### How is FLUX 2 different from FLUX 3?

FLUX 3 is BFL's next generation: a multimodal family with video, images and a robotics model. FLUX 3 Image offers native 4K and box-based editing, and BFL says the compact FLUX 3 Image Klein beats FLUX.2 pro.

### Is FLUX 2 available in AI2Face?

Yes. FLUX 2 is in the AI2Face generator, and you see the cost before you start a generation.

## Sources

- https://bfl.ai/blog/flux-2
- https://bfl.ai/blog/flux2-klein-towards-interactive-visual-intelligence
- https://help.bfl.ai/articles/7655484417-what-flux-models-are-available
- https://huggingface.co/black-forest-labs/FLUX.2-klein-4B
- https://bfl.ai/blog/flux-3-image-klein