PrismML Releases Bonsai Image 4B: 1-Bit Text-to-Image Diffusion Transformers Running in Browser at 0.93GB

r/LocalLLaMA / PR Newswire·high signal

PrismML released Bonsai Image 4B, binary (1-bit) and ternary text-to-image diffusion transformers that achieve 8.3x size reduction (0.93GB vs ~16GB for FLUX.2 Klein 4B) while retaining ~95% of full-precision image quality. The models run entirely locally — 9.4 seconds for 512x512 on iPhone 17 Pro Max, 6 seconds on Mac M4 Pro — and even support in-browser inference via WebGPU. Released under Apache-2.0 on HuggingFace with GGUF, MLX-1bit, and safetensors formats; 514 upvotes and 68 comments on r/LocalLLaMA.