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Model: Entrit/Qwen2.5-3B-trit-uniform-d3 Source: Original Platform
2026-06-15 12:42:17 +08:00
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+2026-04-15T13:21:51.436270
--- a/README.md
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+---
+license: apache-2.0
+base_model: Qwen/Qwen2.5-3B
+tags:
+  - quantization
+  - ternary
+  - balanced-ternary
+  - tritllm
+library_name: transformers
+---
+
+# Qwen2.5-3B-trit-uniform-d3
+
+Balanced ternary quantization of [`Qwen/Qwen2.5-3B`](https://huggingface.co/Qwen/Qwen2.5-3B) at depth **d=3** (27 levels per weight, **5.05 bits per weight**).
+
+Produced with the codec from **"Balanced Ternary Post-Training Quantization for Large Language Models"** (Stentzel, 2026). See [Entrit/tritllm-codec](https://huggingface.co/Entrit/tritllm-codec) for the codec source.
+
+## Quick load
+
+```python
+from transformers import AutoModelForCausalLM, AutoTokenizer
+
+model = AutoModelForCausalLM.from_pretrained("Entrit/Qwen2.5-3B-trit-uniform-d3")
+tokenizer = AutoTokenizer.from_pretrained("Entrit/Qwen2.5-3B-trit-uniform-d3")
+```
+
+The weights are dequantized to FP16 for stock-`transformers` compatibility. The on-disk size is therefore the same as the FP16 source. The 5.05-bpw figure refers to the *information content* of the quantized matrices and is what matters for inference on hardware that consumes the packed trit format directly (see [Entrit/tritllm-kernel](https://huggingface.co/Entrit/tritllm-kernel)).
+
+## Quantization details
+
+| Field | Value |
+|---|---|
+| Source model | [`Qwen/Qwen2.5-3B`](https://huggingface.co/Qwen/Qwen2.5-3B) |
+| Depth | d=3 (27 levels) |
+| Bits per weight | 5.05 |
+| Group size | 16 |
+| Scale codebook | 27-entry log-spaced (scale_depth=3) |
+| Method | Uniform PTQ |
+| Quantized layers | all 2D linear matrices |
+| Kept FP16 | `lm_head`, token embeddings, all `*_norm` layers |
+| Codec | tritllm v2 |
+
+## Citation
+
+```
+@article{stentzel2026ternaryptq,
+  title  = {Balanced Ternary Post-Training Quantization for Large Language Models},
+  author = {Stentzel, Eric},
+  year   = 2026,
+  note   = {Entrit Systems}
+}
+```
+
+## Reproducibility
+
+```bash
+git clone https://huggingface.co/Entrit/tritllm-codec
+cd tritllm-codec
+python quantize_model_v2.py --model Qwen/Qwen2.5-3B --configs uniform-d3 --out ./out
+```
--- a/config.json
+++ b/config.json
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+{
+  "architectures": [
+    "Qwen2ForCausalLM"
+  ],
+  "attention_dropout": 0.0,
+  "bos_token_id": 151643,
+  "dtype": "float16",
+  "eos_token_id": 151643,
+  "hidden_act": "silu",
+  "hidden_size": 2048,
+  "initializer_range": 0.02,
+  "intermediate_size": 11008,
+  "layer_types": [
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention",
+    "full_attention"
+  ],
+  "max_position_embeddings": 32768,
+  "max_window_layers": 36,
+  "model_type": "qwen2",
+  "num_attention_heads": 16,
+  "num_hidden_layers": 36,
+  "num_key_value_heads": 2,
+  "pad_token_id": null,
+  "rms_norm_eps": 1e-06,
+  "rope_parameters": {
+    "rope_theta": 1000000.0,
+    "rope_type": "default"
+  },
+  "sliding_window": null,
+  "tie_word_embeddings": true,
+  "transformers_version": "5.5.3",
+  "use_cache": true,
+  "use_mrope": false,
+  "use_sliding_window": false,
+  "vocab_size": 151936
+}
--- a/generation_config.json
+++ b/generation_config.json
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+{
+  "bos_token_id": 151643,
+  "do_sample": false,
+  "eos_token_id": 151643,
+  "max_new_tokens": 2048,
+  "transformers_version": "5.5.3"
+}
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--- a/tokenizer_config.json
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+{
+  "add_prefix_space": false,
+  "backend": "tokenizers",
+  "bos_token": null,
+  "clean_up_tokenization_spaces": false,
+  "eos_token": "<|endoftext|>",
+  "errors": "replace",
+  "extra_special_tokens": [
+    "<|im_start|>",
+    "<|im_end|>",
+    "<|object_ref_start|>",
+    "<|object_ref_end|>",
+    "<|box_start|>",
+    "<|box_end|>",
+    "<|quad_start|>",
+    "<|quad_end|>",
+    "<|vision_start|>",
+    "<|vision_end|>",
+    "<|vision_pad|>",
+    "<|image_pad|>",
+    "<|video_pad|>"
+  ],
+  "is_local": true,
+  "model_max_length": 131072,
+  "pad_token": "<|endoftext|>",
+  "split_special_tokens": false,
+  "tokenizer_class": "Qwen2Tokenizer",
+  "unk_token": null
+}