Hebrus Studio — Metal first. SSD when memory ends.

Qwen3.6-35B-A3B — Hebrus GGUF releases

This repository keeps the versioned Qwen3.6-35B-A3B releases for the Hebrus inference engine. Hebrus began as a fork of Salvatore Sanfilippo's antirez/ds4. Historical DS4 names remain only in filenames and serialized compatibility fields. Its routed MoE weights are embedded in the GGUF as a self-describing ds4.expert_major.v2 store; no sidecar, runtime repack, or second copy of the routed bank is required.

Compatibility: existing filenames, the dsbox.json manifest, and the ds4.expert_major.v2 marker remain unchanged serialized contracts.

Versions

File Status Runtime
Qwen3.6-35B-A3B-DS4-ExpertMajor-v2-MLX-Affine4-G64.gguf Current Hebrus main at 73a332f or newer
Qwen3.6-35B-A3B-DS4-ExpertMajor-v2-Q4_K_S.gguf Retired v2/Q4 evidence Rejected by the current affine-only runtime
Qwen3.6-35B-A3B-DS4-ExpertMajor-v1-Q4_K_S.gguf Legacy migration evidence Retired Hebrus v1 runtime only
Qwen3.6-35B-A3B-ds4-Q4_K_S.gguf Legacy canonical converter input Generic GGUF tooling; rejected by current Hebrus inference

Hebrus Studio and the root dsbox.json select only the affine4/group-64 ExpertMajor v2 artifact. The older files are kept so existing links and reproducibility records remain valid; they are not fallbacks and must not be auto-selected by current Hebrus.

This is a Hebrus-native GGUF extension, not a portable GGUF layout. Generic GGUF loaders cannot reconstruct or execute its routed weights. Canonical Qwen GGUFs, ExpertMajor v1 files, sidecar layouts, and non-Metal inference are not supported by the qualified Hebrus runtime for this model. Use the original model or a canonical quantization with another runtime when generic-loader compatibility is required.

Artifact

Property Value
Base model Qwen/Qwen3.6-35B-A3B
File Qwen3.6-35B-A3B-DS4-ExpertMajor-v2-MLX-Affine4-G64.gguf
Size 20,808,566,880 bytes (19.38 GiB)
SHA-256 dd17266185833a9f05531ce366fd7284ddca1ed64aa3dcf06e321e8c72c9ea3d
Container GGUF v3 with one embedded ds4.expert_major.v2 store
Routed geometry 40 routed layers, 256 experts per layer
Routed payload 18,119,393,280 bytes
Routed storage MLX-compatible affine 4-bit groups: 32 packed bytes + BF16 scale + BF16 bias per 64 weights
Qualified hardware Apple Silicon Metal, at least 16 GiB unified memory

The affine conversion changes the physical representation consumed by Hebrus' resident and SSD-streamed Metal kernels without introducing a sidecar or a new container version. The same GGUF runs in AUTO resident or SSD mode. It is not a portable llama.cpp, MLX, Ollama, or generic GGUF artifact.

Run with Hebrus

Use andreaborio/hebrus main at commit 73a332fef82a0bcdd567d17e0de17aa004cad85d or a compatible descendant:

git clone https://github.com/andreaborio/hebrus.git
cd hebrus
make -j

./hebrus \
  -m /absolute/path/to/Qwen3.6-35B-A3B-DS4-ExpertMajor-v2-MLX-Affine4-G64.gguf \
  --ctx 8192

The embedded ExpertMajor v2 store, Metal backend, and residency policy are selected automatically. No Qwen enable flag, sidecar path, pack path, or hash environment variable is needed. AUTO uses SSD streaming when the resident budget does not fit; the admission floor is 16 GiB unified memory.

Correctness and measured performance

Final qualification on an Apple M5 Pro 64 GiB measured:

Prompt frontier Resident prefill Forced-SSD prefill
128 523.72 t/s 210.70 t/s
2,048 1,661.18 t/s 551.57 t/s
8,192 1,421.90 t/s 269.10 t/s
32,768 877.34 t/s 83.69 t/s

The 128+16 lane measured 57.43 t/s resident decode and 23.94 t/s with a cold 321-expert SSD cache. Both modes produced the same 16 greedy token IDs. At 32K, adaptive macro-prefill reduced expert reads from 60.776 GiB to 16.875 GiB (-72.24%) with a -0.63% throughput delta. Actual graph allocation also passed the model-declared 262,144-token maximum. These are bounded local measurements; context, output length, thermals, storage, and memory pressure affect results.

Current limitations

  • Apple Silicon Metal is the only qualified inference backend.
  • At least 16 GiB unified memory is required; constrained hosts use SSD streaming.
  • The file requires Hebrus commit 73a332fef82a0bcdd567d17e0de17aa004cad85d or a compatible descendant implementing ds4.expert_major.v2 for qwen35moe.
  • Canonical Qwen GGUF inference, the retired ExpertMajor v2 Q4 payload, ExpertMajor v1, sidecars, and non-Metal inference are deliberately rejected.
  • A generic GGUF loader can inspect the outer container but cannot execute the opaque routed store.

License and attribution

The base model is released by the Qwen team under the Apache 2.0 license. See the upstream model card for model architecture, training, safety, license, and attribution details.

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