LocalMuseAI/coreml-cyberillustrious-v12-6bit

CyberIllustrious V12 — Core ML for LocalMuse

A production-oriented Core ML conversion of Cyberdelia's native, non-distilled CyberIllustrious v12.0 FP16 checkpoint for local, on-device 1024×1024 generation in LocalMuse.

Runtime profile

• Native Illustrious/SDXL 1024×1024; this is not Lightning, LCM, Turbo, or DMD.
• 30–45 diffusion steps; LocalMuse defaults to 35.
• DPM-Solver++ Karras, CFG 5, batch size one.
• Recommended positive conditioning prefix: masterpiece, best quality, high quality, ultra-detailed.
• Two 6-bit split UNet components, each below the iOS 1 GiB component limit.
• Exact v12 conditioning layers: CLIP-L at FP16 and OpenCLIP-bigG at 8-bit.
• Checkpoint VAE decoder and encoder for Text to Image, Transform, and LocalMuse Face Detail, with the Illustrious latent scale 0.18215.
• GPU-preferred execution. This exact artifact passed a complete 30-step 1024×1024 Core ML pipeline test on GPU; its ANE execution plan failed on the validation Mac and is intentionally not selected by LocalMuse.
• Requires a device in the nominal 8 GiB memory class.

Palettization changes model storage, not the normal diffusion schedule. It does not turn v12 into a reduced-step model.

Source and reproducibility

The official source is Cyberdelia's Civitai CyberIllustrious v12.0, version 3022570, file cyberrealistic_v120.safetensors, SHA-256 1b0c37e09fbfd100c78cec7c9392634bcc78eb2bb4f3004cff36755c4512b9a8. The same exact bytes were obtained from the pinned Hugging Face transport mirror grq/GemCollection at revision f0ce2a74f04cf813d12e515bd0b8da5a82dfa5e9.

The checkpoint contains non-finite values only in CLIP-L's unused final transformer layer. The converter replaces only those values with the matching pinned official Illustrious base layer. Prompt conditioning uses the preceding hidden state, while pooled conditioning comes from the exact v12 second encoder. Exact inputs, revisions, hashes, component sizes, VAE-scale evidence, and validation results are recorded in PROVENANCE.json.

License and attribution

CyberIllustrious is by Cyberdelia. The source Hugging Face model card declares creativeml-openrail-m, describes CreativeML Open RAIL++-M, and links the Stable Diffusion license. The complete linked license text is included in LICENSE.md. Cyberdelia's Civitai permissions for v12 allow commercial use and derivatives. Attribution and all use-based restrictions continue to apply to this converted artifact.