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README.md
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---
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license: mit
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base_model: zai-org/GLM-4.7-Flash
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tags:
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- turboquant
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- quantization
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- moe
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- vllm
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- weight-compression
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library_name: turboquant-vllm
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---
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# GLM-4.7-Flash TQ3 (3-bit TurboQuant)
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TurboQuant 3-bit weight-compressed checkpoint of [GLM-4.7-Flash](https://huggingface.co/zai-org/GLM-4.7-Flash).
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## Key Numbers
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| Metric | Value |
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|--------|-------|
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| Original size (BF16) | ~62 GB |
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| Compressed size (TQ3) | ~14.7 GB |
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| Compression ratio | ~4.2x |
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| Architecture | GLM-4 MoE (355B total, 32B active, 64 experts) |
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| Attention | MLA (Multi-Latent Attention) |
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| Group size | 128 |
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| Quantization | TurboQuant polar (WHT rotation + Lloyd-Max codebook) |
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## Usage with vLLM
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Requires [turboquant-plus-vllm](https://github.com/varjoranta/turboquant-vllm) plugin:
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```bash
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pip install turboquant-plus-vllm
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vllm serve varjosoft/GLM-4.7-Flash-TQ3 --max-model-len 4096 --enforce-eager
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```
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The plugin auto-registers the `turboquant` quantization method via vLLM's plugin system. No `--quantization` flag needed — it's detected from the checkpoint's `config.json`.
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## Standalone Usage
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```python
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from turboquant_vllm.checkpoint import load_tq3_model
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model, tokenizer = load_tq3_model("varjosoft/GLM-4.7-Flash-TQ3")
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```
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## How It Works
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TurboQuant uses data-oblivious compression (no calibration data needed):
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1. Weight rows are split into groups of 128
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2. Each group is normalized, rotated (Walsh-Hadamard Transform with random diagonal signs), and quantized against a Lloyd-Max codebook for N(0, 1/d)
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3. 3-bit indices are sub-byte packed (8 indices → 3 bytes)
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4. At inference time, indices are unpacked, dequantized via codebook lookup + inverse rotation
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## Compression Details
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- **Compressed layers**: All linear weights (attention projections, MLP projections, MoE expert weights)
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- **Uncompressed**: Embeddings, layer norms, MoE router weights, lm_head
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- **Checkpoint format**: Standard safetensors with `.tq_packed` (uint8) and `.tq_norms` (float32) tensors
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## Architecture Notes
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GLM-4.7-Flash uses the same MoE architecture as GLM-5.1 (769B) but 10x smaller:
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- 47 transformer layers (3 dense + 44 MoE)
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- 64 routed experts + 1 shared expert per MoE layer, top-4 routing
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- MLA attention (kv_lora_rank based)
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- This checkpoint validates TQ3 loading for the GLM MoE family
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## Status
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- **GPU tested**: Pending (checkpoint loads verified, inference testing in progress)
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- **Quality**: Expected to match BF16 based on TQ3 results on other models (Gemma 4 scored 4.76/5 on 20-scenario benchmark)
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## Related
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- [turboquant-vllm](https://github.com/varjoranta/turboquant-vllm) — TurboQuant compression library for vLLM
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- [varjosoft/GLM-5.1-Open-TQ3](https://huggingface.co/varjosoft/GLM-5.1-Open-TQ3) — Same compression on GLM-5.1 (769B)
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- [varjosoft/gemma-4-26B-A4B-it-TQ3-native](https://huggingface.co/varjosoft/gemma-4-26B-A4B-it-TQ3-native) — TQ3 on Gemma 4
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Created by [Varjosoft](https://varjosoft.com).
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