1-bit Bonsai Image 4B: A Diffusion Model Under 1GB

Melvin Vivas · X post · 2026-05-27 · Open on X

Topics: Fine-tuning & Model Customization, Industry Trends & Job Market · Level: intermediate

Summary

A quoted announcement says the 1-bit Bonsai Image 4B diffusion transformer is only 0.93GB, 8.3x smaller than the full-precision version. It shows how extreme quantization shrinks image models enough to run on small devices.

Key points

• Bonsai Image 4B is a 4B-parameter diffusion transformer.
• The 1-bit quantized variant is 0.93GB, which is 8.3x smaller than full precision.
• This is the maximum-compression variant, built to shrink the footprint as much as possible.
• An image model under 1GB is small enough for edge and in-browser use.

Resources mentioned

• Bonsai Image 4B (1-bit) · tool · prismml.com · free
  1-bit quantized 4B diffusion transformer image model that is only 0.93GB.