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Description

The Bonsai Image Ternary 4B MLX 2-bit is a text-to-image diffusion transformer specifically designed for deployment on Apple Silicon, emphasizing quality in its Bonsai Image variant. This model utilizes ternary weights of {−1, 0, +1} along with FP16 group-wise scaling in its transformer layers, which encompass Q/K/V projections, output projections, and MLP weights. Notably, it reduces the size of the FLUX.2 Klein 4B transformer from 7.75 GB FP16 to just 1.21 GB, achieving a remarkable 6.4× smaller footprint while maintaining visual quality and fidelity to prompts akin to the original model. The deployment package for Apple Silicon is 3.88 GB, which includes the MLX 2-bit diffusion transformer, a 4-bit Qwen3-4B text encoder, and an FP16 Flux2 VAE. After the text encoder handles prompt encoding, it is offloaded to ensure that only the compact transformer and VAE remain in memory during the denoising loop. Furthermore, the model employs a 4-step FlowMatchEuler sampler with guidance set at 1.0 and a shift of 3.0, eliminating the need for CFG and negative prompts, thus streamlining the generation process for enhanced user experience. Overall, this innovation represents a significant advancement in efficient and effective image generation technology.

Description

FLUX.2 [klein] is the quickest variant within the FLUX.2 series of AI image models, engineered to seamlessly integrate text-to-image creation, image modification, and multi-reference composition into a singular, efficient architecture that achieves top-tier visual quality with sub-second response times on contemporary GPUs, making it ideal for applications demanding real-time performance and minimal latency. It facilitates both the generation of new images from textual prompts and the editing of existing visuals with reference points, offering a blend of high variability and lifelike output while ensuring extremely low latency, allowing users to quickly refine their work in interactive settings; compact distilled models can generate or modify images in less than 0.5 seconds on suitable hardware, and even the smaller 4 B variants are capable of running on consumer-grade GPUs with around 8–13 GB of VRAM. The FLUX.2 [klein] range includes various options, such as distilled and base models with 9 B and 4 B parameters, providing developers with the flexibility needed for local deployment, fine-tuning, research purposes, and integration into production environments. This diverse architecture enables a variety of use cases, making it a versatile tool for both creators and researchers alike.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

FLUX Upscale No 
FLUX.2 No 
OpenClaw No 

Integrations

FLUX Upscale Yes 
FLUX.2 Yes 
OpenClaw Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial Yes 
Free Version No 

Deployment

Web-Based No 
On-Premises Yes 
iPhone App Yes 
iPad App Yes 
Android App Yes 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Vendor Details

Company Name

PrismML

Founded

2026

Country

United States

Website

prismml.com

Vendor Details

Company Name

Black Forest Labs

Founded

2024

Country

Germany

Website

bfl.ai/models/flux-2-klein

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