mlximages

Apple Silicon (MLX) builds of Bonsai Image 4B, mirrored for on-device text-to-image generation in Privacy AI. Nothing here is original work: these are redistributed Apache-2.0 models, repackaged so that each one is self-contained.

Directory	Weights	Download
bonsai-image-4B-ternary-mlx	2-bit (ternary)	~3.97 GB
bonsai-image-4B-binary-mlx	1-bit (binary)	~3.51 GB

Both arms render at 512x512 and 1024x1024 in four steps. They share a byte-identical 4-bit Qwen3 text encoder, which is why the binary arm is smaller to download but needs the same memory to run — the peak is the text encoder, not the transformer.

Layout

bonsai-image-4B-{binary,ternary}-mlx/
  transformer-packed-mflux/     packed diffusion transformer
  text_encoder-mlx-4bit/        Qwen3 4-bit text encoder
  tokenizer/                    includes chat_template.jinja
  vae-small-decoder/            relocated from black-forest-labs/FLUX.2-small-decoder
  LICENSE  NOTICE.md  README.md  MIRROR-NOTES.md

Each arm's MIRROR-NOTES.md records exactly what was removed, what was added and the source repository and revision of each — Apache-2.0 §4(b), since the payload composition differs from upstream even though no file was edited.

Two deliberate differences from the upstream arms:

• vae/ is removed. The full VAE has different BatchNorm statistics from the small decoder this pipeline actually runs, so shipping it would only invite the wrong one being loaded.
• vae-small-decoder/ is added, taken from black-forest-labs/FLUX.2-small-decoder. That repository ships no LICENSE file — the licence exists only as card metadata — so this mirror supplies an Apache-2.0 copy and a provenance README alongside it, as §4(a) requires of anyone redistributing the work.

Attribution

Created using Bonsai Image by Prism ML. Bonsai Image 4B is copyright 2026-present Prism ML, Inc., built from FLUX.2 [klein] 4B (copyright 2026 Black Forest Labs) with a text encoder built from Qwen3-4B (copyright 2024 Alibaba Cloud). All are available under the Apache 2.0 License; see each directory's NOTICE.md.

Apache-2.0 §6 grants no trademark rights. Naming the works here identifies their origin, as §4(c) requires, and is not a trademark licence.