Qwen3.8-27B MLX W4/g64 + Embedded W4 MTP

This is EigenLabs/Qwen3.8-27B-4bit at exact revision 301e9e2767fd0efcfab7883004720ba3c9a552a1 with the previously separate MTP proposal head (EigenLabs/Qwen3.8-27B-MTP-4bit at exact revision 329261c5e0b3f9c233485e682cb3b67b88c20a55) embedded in the same indexed safetensors weight set under the mtp.* prefix.

• Target and vision tower tensors: byte-identical to the pinned target revision.
• MTP head tensors: byte-identical to the pinned head revision (W4/g64 affine, BF16 scales/biases, one full-attention layer, ~239 MB), re-keyed from the standalone layout (fc.weight, layers.0.*, …) to mtp.*.
• Declared via mtplx_mtp / mtplx_mtp_quantization in config.json (prefix: "mtp.", block_size: 3). The head shares the target embedding and LM head; the target backbone remains authoritative for token acceptance and final output.

This repository supersedes the external-head pairing: the draft/target revision pins that previously lived in a README are now structural — one manifest, one weight hash, nothing to drift.

Measured (M4 Max, 546 GB/s, temperature 0)