Target trunk: true flat 8-bit MLX affine quantization, group64.
MTP auxiliary tensors (mtp.fc, norms, scales/biases, and non-linear tensors) are preserved in BF16 where applicable.

This is intended as the higher-quality sibling to Qwen3.6-27B-MTPLX-Optimized-Speed. It favors the Flat8 target and calibrated INT8 proposal sidecar instead of the smaller speed-focused artifact.

MTPLX

mtplx start --model Youssofal/Qwen3.6-27B-MTPLX-Optimized-Quality

The artifact includes mtplx_runtime.json and mtp/weights.safetensors, so MTPLX can inspect and route it through the native Qwen MTP backend while generic MLX vision loaders only glob the base model shards.

Local bakeoff snapshot

Measured on the local M5 Max max-fan Flappy 2k depth-3 bakeoff:

Metric	Value
Decode TPS	33.63
Acceptance D1/D2/D3	95.6% / 85.3% / 74.1%
Verify ms/call	88.1 ms
Peak memory	27.62 GiB

This row is a local release-readiness check, not a broad public hardware claim.

Provenance

Base model: Qwen/Qwen3.6-27B
MTPLX staging manifest: mtplx_upload_manifest.json

Vision compatibility

This revision keeps the optimized MTPLX draft sidecar at mtp/weights.safetensors so generic VLM loaders see only the normal Qwen vision/text weight shards at the repository root. The base trunk is the MLX 8-bit Qwen3.6 vision layout; MTPLX reads the draft sidecar through config.json.