Bonsai Image 4B is only ~3GB in size, compared to FLUX.2 Klein 4B at ~16GB?

Bonsai Image 4B is only ~3GB in size, compared to FLUX.2 Klein 4B at ~16GB.

Uses 1-bit/ternary quantization (binary/ternary weights) to reduce memory and compute?

Uses 1-bit/ternary quantization (binary/ternary weights) to reduce memory and compute.

Runs 100% locally in browser via WebGPU, with Apache-2.0 license for open use.

Open Source

r/LocalLLaMA May 27, 2026

⚡A 3GB diffusion model runs entirely on WebGPU in your browser—no GPU needed.

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Deep Dive

PrismML cooked with these models — just ~3GB (vs FLUX.2 Klein 4B at ~16GB), Apache-2.0. Check the official collection on Hugging Face and demo link.

Key Points

Bonsai Image 4B is only ~3GB in size, compared to FLUX.2 Klein 4B at ~16GB.
Uses 1-bit/ternary quantization (binary/ternary weights) to reduce memory and compute.
Runs 100% locally in browser via WebGPU, with Apache-2.0 license for open use.

Enables private, offline AI image generation on any device with a modern browser, democratizing access.