⚠️ REQUIRED — jangtq_runtime.safetensors sidecar must be downloaded

Osaurus uses the native Swift JANGTQ runtime. Every JANGTQ bundle on OsaurusAI ships a small jangtq_runtime.safetensors sidecar (~10 KB–~165 KB) alongside the weight shards. The Swift loader will refuse to start with the error
Error: Model '<name>' declares JANGTQ (weight_format: "mxtq") but is
       missing required sidecar file 'jangtq_runtime.safetensors'.
       Re-download the full model or obtain the sidecar from the original
       publisher.
if the file is absent.

If your local copy doesn't have it (older download, partial sync, etc):

hf download OsaurusAI/Qwen3.6-35B-A3B-JANGTQ2 jangtq_runtime.safetensors --local-dir <your-dir>

The file holds the deterministic codebooks + Hadamard rotation signs the Swift loader uses to decode *.tq_packed weights. It must match the seed the bundle was quantized with (mxtq_seed=42).

Qwen 3.6 35B-A3B — JANGTQ2 (MLX)

TurboQuant codebook quantization of Alibaba's hybrid linear/full-attention agentic MoE — routed experts at 2-bit via Lloyd-Max codebooks + Hadamard rotation, attention / embed / shared-expert / lm_head at 8-bit affine, vision tower preserved.

OsaurusAI

Model Details

Property	Value
Base model	`Qwen/Qwen3.6-35B-A3B`
Parameters (source)	35 B total, ~3 B active per token
Architecture	`qwen3_5_moe` — 40 decoder layers: 30 `Gated DeltaNet` (linear attn) + 10 full attention, 256 routed experts + 1 always-on shared expert
Quantization format	`weight_format: mxtq` — routed experts via TurboQuant codebook (2-bit), everything else affine 8-bit or fp16 passthrough
Routed-expert storage	`.tq_packed` (uint32) + `.tq_norms` (fp16) + `.tq_bits` (uint8); codebook + Hadamard signs re-derived deterministically at load
Package size on disk	11.63 GB across 12 shards
Shipped tensors	1,930 total (1,597 language-model + 333 vision tower + 120 routed-expert TQ triples)
Vocab	248,320
Context (position embeddings)	262,144 native; the upstream model card reports up to ~1 M with YaRN scaling
Vision tower	27-layer ViT (hidden 1152, patch 16), preserved in fp16
Chat format	Qwen im_start/im_end, unified thinking toggle

Quantization details, per tensor category

Category	Bits	Group / codebook	Notes
Routed-expert MLP (`mlp.experts.gate_up_proj`, `down_proj`)	2 (JANGTQ)	2^2 Lloyd-Max centroids + Hadamard rotation	`.tq_packed` + `.tq_norms` + `.tq_bits` triples
Embedding (`embed_tokens`), `lm_head`	8 (affine)	group 64	MLX-native `QuantizedLinear`
Full-attention projections (`q_proj`, `k_proj`, `v_proj`, `o_proj`)	8 (affine)	group 64	Gate-doubled q_proj for `attn_output_gate`
Linear-attention projections (`in_proj_qkv`, `in_proj_z`, `in_proj_b`, `in_proj_a`, `out_proj`)	8 (affine)	group 64	Gated DeltaNet
Shared-expert MLP (`gate_proj`, `up_proj`, `down_proj`)	8 (affine)	group 64	Always active per token
Router (`mlp.gate`)	fp16 passthrough	—	Precision-critical
Shared-expert gate (`shared_expert_gate`)	fp16 passthrough	—	sigmoid scalar gate
Norms (`_layernorm`, `_norm`), `A_log`, `dt_bias`, `conv1d`	fp16 passthrough	—	Un-quantized
Vision tower (333 tensors)	fp16 passthrough	—	`patch_embed.proj` axes pre-transposed to MLX layout

JANGTQ ("TurboQuant") stores routed-expert weights as indices into a small Lloyd-Max codebook with a per-row norm, after a randomized Hadamard rotation that concentrates the distribution so quantization error is uniform. At inference, the input is rotated once per layer (cheap fused Metal kernel) and dot products happen against the codebook centroids directly, so we never dequantize back to affine. Compared to affine 2-bit at the same bit budget, this gives better quality AND faster decode on the routed-expert MLP path.

Usage

JANGTQ requires our custom loader — stock mlx_lm.load() can't parse .tq_packed tensors. You need jang-tools (free, public): https://github.com/jjang-ai/jangq.

bash

pip install mlx mlx-lm mlx-vlm
git clone https://github.com/jjang-ai/jangq && pip install -e ./jangq/jang-tools

Text

python

from jang_tools.load_jangtq import load_jangtq_model
from mlx_lm import generate

model, tokenizer = load_jangtq_model("OsaurusAI/Qwen3.6-35B-A3B-JANGTQ2")
print(generate(model, tokenizer,
               prompt="The capital of France is",
               max_tokens=64))

Image (VLM)

python

from jang_tools.load_jangtq_vlm import load_jangtq_vlm_model
from mlx_vlm import generate
from mlx_vlm.prompt_utils import apply_chat_template
from mlx_vlm.utils import load_config

path = "OsaurusAI/Qwen3.6-35B-A3B-JANGTQ2"
model, processor = load_jangtq_vlm_model(path)
config = load_config(path)

prompt = apply_chat_template(processor, config, "Describe this image.", num_images=1)
print(generate(model, processor, prompt, image="path/to/image.jpg", max_tokens=200))

Reasoning toggle

python

msgs = [{"role": "user", "content": "What is 17 × 23?"}]
# Reasoning OFF — pre-closed <think></think> block
prompt = tokenizer.apply_chat_template(msgs, add_generation_prompt=True,
                                       enable_thinking=False)
# Reasoning ON — model fills the <think> block
prompt = tokenizer.apply_chat_template(msgs, add_generation_prompt=True,
                                       enable_thinking=True)

Pass enable_thinking as a direct kwarg (the chat_template_kwargs={...} form only propagates on some tokenizer versions).

Video

The base model supports video via transformers and the bundle preserves video_preprocessor_config.json. mlx-vlm 0.4.4's prepare_inputs has no video path yet for qwen3_5_moe — the Python load_jangtq_vlm path wraps video via a custom processor for our test harness. For mainline mlx-vlm users, stick to image input; use upstream transformers for video.

Hardware notes

~12 GB on disk; expect ~12–14 GB resident after load, plus KV cache.

Mac unified RAM	Works?	Notes
24 GB	✅ comfortable	Full 32 k context OK
32 GB	✅	32-100 k context depending on profile
24 GB	✅	text-only, short context

Benchmarks

Base-model reference (Qwen/Qwen3.6-35B-A3B, upstream, not this quant):

MMLU-Pro	AIME 2026	LiveCodeBench v6	GPQA	SWE-bench Verified
85.2	92.7	80.4	86.0	73.4

Independent JANGTQ-quant evaluation is tracked in the jang-tools repo and will land in future README revisions.

Citation

bibtex

@misc{qwen2026qwen36,
  title  = {Qwen3.6-Plus: Towards Real World Agents},
  author = {Qwen Team},
  year   = {2026},
  url    = {https://qwen.ai/blog?id=qwen3.6}
}

License

Apache 2.0 — inherits from the base model.

OsaurusAI/Qwen3.6-35B-A3B-JANGTQ2

⚠️ REQUIRED — jangtq_runtime.safetensors sidecar must be downloaded

Qwen 3.6 35B-A3B — JANGTQ2 (MLX)

Model Details

Quantization details, per tensor category

Usage

Text

Image (VLM)

Reasoning toggle

Video

Hardware notes

Benchmarks

Citation

License

OsaurusAI/
Qwen3.6-35B-A3B-JANGTQ2

⚠️ REQUIRED — `jangtq_runtime.safetensors` sidecar must be downloaded