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What is FLUX 3 Image Klein?

FLUX 3 Image Klein, created by Black Forest Labs, is a cutting-edge image-generation model tailored for developers and creative teams. This model converts text prompts into striking visuals and includes features for instruction-based editing, enabling users to guide the process with up to ten reference images, while also offering output resolutions that can reach 4K. With a robust architecture comprising 5.6 billion parameters, it is conveniently accessible through the Black Forest Labs API and can be downloaded for local use. The model comes in various forms, including base and step-distilled versions, to cater to different workflows, and additional quantized formats are available for optimized local deployment. It is ideal for a wide range of applications such as creative production, design experimentation, and prototyping, thereby establishing itself as a flexible tool for image generation. Users should be aware that both local and commercial uses of the model are governed by specific licensing agreements. Additionally, the API operates on a fee structure that varies according to the number of images generated, with pricing influenced by the resolution selected, enabling users to customize their engagements based on project requirements and financial constraints. As such, it provides a comprehensive solution for those looking to enhance their creative processes with advanced image generation technology.

What is Bonsai Image?

The Bonsai Image Ternary 4B MLX 2-bit is a specialized text-to-image diffusion transformer optimized for Apple Silicon, prioritizing high-quality output in its Bonsai Image iteration. By leveraging ternary weights of {−1, 0, +1} alongside FP16 group-wise scaling within its transformer architecture, which includes Q/K/V projections, output projections, and MLP weights, it achieves notable efficiency. This model successfully compresses the FLUX.2 Klein 4B transformer from a hefty 7.75 GB FP16 down to a mere 1.21 GB, resulting in an impressive 6.4× reduction in size while still preserving visual quality and prompt fidelity similar to the original version. The deployment package tailored for Apple Silicon weighs in at 3.88 GB, encompassing the MLX 2-bit diffusion transformer, a 4-bit Qwen3-4B text encoder, and an FP16 Flux2 VAE. Once the text encoder processes the prompt encoding, it is offloaded, ensuring that only the compact transformer and VAE are retained in memory throughout the denoising loop. Additionally, this model incorporates a 4-step FlowMatchEuler sampler with guidance set at 1.0 and a shift of 3.0, effectively eliminating the requirement for CFG and negative prompts, which simplifies the generation process and enhances the overall user experience. Overall, this development marks a noteworthy leap forward in the quest for efficient and high-quality image generation technology, making it accessible for a broader range of applications. Furthermore, the advancements made in this model illustrate the ongoing evolution in the field of machine learning and image synthesis.

Media

No images available

Media

Integrations Supported

ComfyUI

Integrations Supported

API Availability

Has API

API Availability

Has API

Pricing Information

$0.009/1K image
API use is pay-as-you-go, starting at $0.009 per 1K-resolution image; charges vary by image resolution.
Free Version

Pricing Information

Pricing not provided

Supported Platforms

SaaS
On-Prem

Supported Platforms

Android
iPhone
iPad
Windows
Mac
On-Prem
Linux

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Black Forest Labs

Date Founded

2024

Company Location

Germany

Company Website

bfl.ai/blog/flux-3-image-klein

Company Facts

Organization Name

PrismML

Date Founded

2026

Company Location

United States

Company Website

prismml.com

Categories and Features

AI Image Models

Not specified

Categories and Features

AI Image Models

Not specified

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