Flux

Black Forest Labs

An open-source image generation model developed by Black Forest Labs.

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Overview

Flux is Black Forest Labs' open-weights image model family, created by the original authors of Stable Diffusion. It jumped to the top of open-model leaderboards by combining state-of-the-art photorealism, prompt adherence and legible text rendering — traits that used to require separate specialized tools.

Offered in free open variants and Pro API tiers, it has become the default engine inside many third-party image apps. For anyone who wants near-Midjourney quality with Stable-Diffusion-style freedom, Flux is the current answer.

Pros / Cons

Pros

Best-in-class photorealism among open models
Reliable prompt adherence and in-image text
Open weights with hosted API options
Fast adoption across third-party tools

Cons

Larger hardware requirements than older open models
Pro tiers are paywalled via API providers
Ecosystem tooling still maturing versus Stable Diffusion

Who it's for

Photorealistic imagery for products, people and scenes

Powering third-party image apps as the default engine

Local generation when you want modern quality offline

Bottom line

The new state of the art for open image generation — quality that no longer forces a compromise.

Key Features

High-quality generation

Fast inference

Open source

Compare Flux with alternatives

Flux vs Midjourney Flux vs Stable Diffusion Flux vs DALL·E 3 4 products · Image Generation

Frequently asked questions

What is Flux?

Flux is a Image Generation tool developed by Black Forest Labs. The company was founded in 2024 and is headquartered in Freiburg, Germany. An open-source image generation model developed by Black Forest Labs.

Is Flux free?

Yes — Flux is free to use.

Is Flux open source?

Yes — Flux is open source. The source code is publicly available at https://github.com/black-forest-labs/flux.

What are the best alternatives to Flux?

Notable Image Generation alternatives include Midjourney, Stable Diffusion, DALL·E 3. Browse all 4 tools in our Image Generation category for a full overview.

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