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There is no working runtime for this bundle. vMLX, Osaurus, MLX Studio and stock mlx_lm cannot load it today. It is a 318 GB research artifact published for archival and for researchers working on SSD-offloaded MoE inference. It will not fit in RAM on any shipping Apple Silicon machine, and there is no supported way to generate text with it. Requests are reviewed manually — please say what you intend to do with it.

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⚠️ NO RUNTIME AVAILABLE YET — DO NOT EXPECT THIS TO RUN

There is no vMLX / Osaurus / MLX Studio runtime for this bundle. Stock mlx_lm will not load it either.

These weights are published as an archival research artifact, not as a usable model. At 318 GB they do not fit in RAM on any shipping Apple Silicon machine, and the only code that has ever produced coherent text from them is an unreleased SSD-offload prototype (mlxpress) that tops out at ~2.8 tok/s and was shelved for missing its performance bar.

If you want a GLM MoE bundle you can actually run today, use GLM-5.1-JANG_1L instead.


GLM-5.2-JANG_2L

745B-parameter Mixture-of-Experts quantized to 3.12 bits/weight — 318 GB Created by Jinho Jang — eric@jangq.ai

A JANG v2 affine mixed-precision quantization of zai-org/GLM-5.2, produced 2026-07-19 with jang_tools convert -p JANG_2L. The conversion is complete and structurally verified; what does not exist is a runtime that can serve it.


Why this is here

This bundle was built for the mlxpress campaign — an attempt to run a 745B MoE on a 128 GB Apple Silicon machine by keeping only hot experts resident and streaming cold experts from SSD. The quantization worked. The offload engine worked and produced coherent long-context output. It was too slow to ship (~2.8 tok/s against a 6 tok/s bar), so the campaign was paused and no runtime was ever released.

Rather than delete a 318 GB artifact that took a 1.5 TB download and a multi-hour conversion to produce, it is archived here. It is useful if you are working on SSD-offloaded MoE inference, expert-routing analysis, or low-bit quantization of DeepSeek-V3.2-family architectures.


Model summary

Field Value
Base model zai-org/GLM-5.2 (bf16 source, not FP8)
Architecture GlmMoeDsaForCausalLM / model_type=glm_moe_dsa (DeepSeek-V3.2 family + DSA sparse attention)
Parameters ~745 B total, ~40 B active per token
Layers 78 transformer layers + layer 78 = MTP (MTP is present in this bundle, not stripped)
Routed experts 256, top-8, sigmoid routing (noaux_tc), routed_scaling_factor=2.5
Shared experts 1
Dense layers first 3 (first_k_dense_replace=3), intermediate_size=12288
Expert MLP moe_intermediate_size=2048
Hidden size 6144
Attention MLA — q_lora_rank=2048, kv_lora_rank=512, 64 heads, qk_head_dim=256, v_head_dim=256
DSA indexer 32 heads, index_head_dim=128, index_topk=2048, index_topk_freq=4
RoPE theta=8e6, interleaved
Context window 1,048,576 (1M) per config
Vocab 154,880
EOS tokens [154820, 154827, 154829]
Format JANG v2 — MLX-native safetensors, mmap load
On-disk size 318 GiB (341,207,533,424 bytes) across 233 shards, 3,303 tensors
Mode Text-only

Quantization

Profile JANG_2L, affine, via mx.quantize. No AWQ, no Hadamard rotation, no expert pruning, no TurboQuant/JANGTQ anywhere in this bundle.

Setting Value
Method jang-importance
Target bits 2.0
Actual bits 3.12
Group size 64
Scheme asymmetric affine
Backend mx.quantize
Quantization objective MSE
Scoring weight-magnitude
Calibration weights (no activation calibration)
MLP asymmetry floor enabled
Hadamard rotation disabled
Bit widths used 2, 3, 4, 6, 8
Passthrough (unquantized) tensors 0
Manifest 929 entries, schema v1, in jang_config.json

Notable per-tensor assignments:

Tensor class Bits
lm_head 8
embed_tokens 6
dense-layer MLP (layers 0–2) 8
routed experts (switch_mlp.{gate,up,down}_proj) 2 (bulk of the model)

The 3.12 actual-bits figure against a 2.0 target is why this landed at 318 GB rather than the ~300 GB the campaign was aiming for — the asymmetry floor and the 8-bit high-precision slice cost more than budgeted.


Measured performance

All numbers below are from the unreleased mlxpress Python offload prototype on an M5 Max MacBook, 128 GB, experts streamed from internal NVMe, 45 GB hot cache, sampled (temp 0.7 / top-p 0.95 / rep-pen 1.1). These are the only numbers that exist for this bundle.

Routing config Experts kept / 8 tok/s Coherent
exact (all 8) 8.0 0.34–0.40
min-keep 6 by router weight 6.2 0.67
min-keep 5 by router weight 5.4 1.25
min-keep 4 by router weight 4.6 1.85
min-keep 4 + multithreaded reads 4.6 ~2.8 (best stable)
pure force-resident (drop by residency) 2.5 6.9 ❌ garbage

No standard benchmarks (MMLU, HumanEval, GSM8K) were run on this bundle. The campaign was paused before evaluation. Quality was assessed only by manual inspection of generated text, which was coherent at every ✅ row above.

Two findings from those runs that may be useful to others:

  • Coherence needs only the ~4–5 highest-router-weight experts per layer, not all 8. Dropping the low-weight tail stays coherent down to 4.6/8. Dropping by cache residency instead of by router weight discards high-weight experts and immediately produces garbage.
  • Shrink-to-fit is not available for this model. Expert weight matrices were measured to be effectively full-rank and mutually orthogonal, so there is no low-rank or shared-basis trick that makes 40 B active parameters fit the ~50 GB of spendable cache on a 128 GB machine.

Known issues

  1. lm_head is mislabeled. The three lm_head tensors are stored under the language_model. prefix (language_model.lm_head.{weight,scales,biases}) while all 3,300 other tensors use model.. This is a converter bug. Any loader must remap it — the offload prototype had to dequantize it and assign it as a plain fp16 tensor to get coherent output. Loading this bundle without handling that produces pure garbage, which is exactly how the bug was found.
  2. MTP layer 78 is included. model.layers.78.eh_proj and its own MoE block are present. Any loader must either use or explicitly strip them. MTP was evaluated for the offload path and ruled out: verifying K speculative tokens touches K× distinct experts, so drive-bound cost scales with distinct experts read, not with forward passes.
  3. 318 GB does not fit in RAM on any shipping Apple Silicon machine. SSD offload is mandatory, and no released runtime implements it.
  4. Not evaluated. See the benchmarks note above.

Files

File Purpose
model-*-of-00233.safetensors 233 weight shards
model.safetensors.index.json shard map, 3,303 tensors
config.json architecture + MLX quantization block (per-tensor overrides)
jang_config.json full JANG quantization manifest (929 entries)
generation_config.json sampling + stop tokens
tokenizer.json, tokenizer_config.json, chat_template.jinja tokenizer

License

MIT, inherited from zai-org/GLM-5.2.

Credit

Quantization, offload research, and this bundle by Jinho Jangeric@jangq.ai. Base model by Z.ai (Zhipu AI).

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