Heliosoph/openjourney-hyper-onnx

Openjourney + Hyper-SD (4-step) — ONNX

ONNX export of prompthero/openjourney with the ByteDance/Hyper-SD 4-step LoRA fused into the UNet. SD 1.5 architecture, 512×512 native, Euler scheduler, CFG = 1, 4 steps.

Openjourney is prompthero's Midjourney-v4-style fine-tune. Activator phrase: mdjrny-v4 style. Pick this one when you want the painterly / illustrative "MJ look."

Converted artifact. Training credit: prompthero (Openjourney), ByteDance (Hyper-SD).

What this repo contains

model_index.json
feature_extractor/
scheduler/
text_encoder/
tokenizer/
unet/                   # Openjourney UNet + Hyper-SD-15 4-step LoRA fused in
vae_decoder/
vae_encoder/

How it was produced

1. Load prompthero/openjourney via diffusers.
2. Fuse ByteDance/Hyper-SD/Hyper-SD15-4steps-lora.safetensors.
3. optimum-cli export onnx.

Toolchain: optimum 1.24.0, diffusers 0.31.0, transformers 4.45.2, torch 2.4.x (CUDA 12.4). Conversion script: scripts/export-openjourney-hyper.ps1.

Inference notes

Setting	Value
Scheduler	Euler
Steps	4
CFG / guidance scale	1.0
Negative prompt	Skip
Resolution	512×512 native
Activator	Include mdjrny-v4 style in prompts

License

CreativeML OpenRAIL-M (SD 1.5 + Openjourney + Hyper-SD). License files included. By using this model you accept those terms.