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FLUX 3 Image Klein (local)

FLUX 3 Image Klein ships open weights on Hugging Face. OpenTryOn exposes flux3-image-klein-local on generate and edit (Path B, extra="local"). For the BFL hosted API, use FLUX 3 Image Klein (API) (flux3-image-klein, BFL_API_KEY).

Requirements​

pip install opentryon[local]
pip install -U diffusers transformers

Accept the FLUX Kommunity License on Hugging Face for the checkpoint you use.

CheckpointHF idTypical use
Distilled (default)black-forest-labs/flux-3-image-kleinFast T2I / edit (~16 steps, no CFG)
Baseblack-forest-labs/flux-3-image-klein-baseFine-tuning / LoRA (~50 steps, CFG)

Override with --model-id or FLUX3_IMAGE_KLEIN_MODEL_ID.

VRAM: BFL targets consumer GPUs (e.g. RTX 3090+). Quantized single-file variants (fp8r, nvfp4) are documented on Hugging Face but not auto-selected by this adapter yet.

CLI​

# Text-to-image (1024×1024 default)
opentryon generate --model flux3-image-klein-local \
  --prompt "Editorial fashion still, soft window light" \
  --seed 0

# Base checkpoint with CFG
opentryon generate --model flux3-image-klein-local \
  --model-id black-forest-labs/flux-3-image-klein-base \
  --guidance-scale 3.5 --steps 50 \
  --prompt "Lookbook flat lay on white seamless"

# Edit / restyle
opentryon edit --model flux3-image-klein-local \
  --image data/model-1.jpg \
  --prompt "Change the blazer to deep burgundy velvet"

# Multi-reference (order matches <ref_image_0>, <ref_image_1>, … in prompt)
opentryon edit --model flux3-image-klein-local \
  --image person.jpg --reference-images garment.jpg \
  --prompt "Dress the person from <ref_image_0> in the outfit from <ref_image_1>"

opentryon generate --model flux3-image-klein-local --prompt "test" --dry-run

Layout control uses the same bounding-box JSON appended to the prompt as the BFL Klein guide.

Python​

from tryon.models import Flux3ImageKleinLocalAdapter

adapter = Flux3ImageKleinLocalAdapter()
images = adapter.generate_text_to_image(
    prompt="Editorial fashion still",
    width=1024,
    height=1024,
    seed=0,
)
images[0].save("klein_local.png")

MCP​

Restart MCP after registry changes. Tools: generate_flux3_image_klein_local, edit_flux3_image_klein_local.