This is Geer's independently produced mixed 4/8-bit MLX conversion of Qwen3.8-27B for 48 GB Apple-Silicon Macs. Geer does not offer or claim a 32 GB Qwen profile; those machines continue to use Ornith. This is not a new foundation model.

Large feed-forward matrices use affine 4-bit quantization. Attention and linear-attention projections use 8-bit quantization; the vision tower, embeddings, output head, norms, and native MTP tensors remain unquantized. The build uses group size 64 and upstream revision 1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0.

Upstream benchmark results describe the BF16 checkpoint, not this conversion. This artifact retained 100% of the qualified 6-bit aggregate pass rate in the initial 128 GB host canaries. Its 48 GB support profile uses a 128K context ceiling. That tier remains provisional until exercised on a real 48 GB Mac.