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Model: pkshatech/GLuCoSE-base-ja-v2 Source: Original Platform
2026-05-14 18:04:47 +08:00
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--- a/README.md
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+---
+language:
+- ja
+library_name: sentence-transformers
+tags:
+- sentence-transformers
+- sentence-similarity
+- feature-extraction
+metrics:
+- pearson_cosine
+- spearman_cosine
+- pearson_manhattan
+- spearman_manhattan
+- pearson_euclidean
+- spearman_euclidean
+- pearson_dot
+- spearman_dot
+- pearson_max
+- spearman_max
+widget: []
+pipeline_tag: sentence-similarity
+datasets:
+- hpprc/emb
+- hpprc/mqa-ja
+- google-research-datasets/paws-x
+base_model: pkshatech/GLuCoSE-base-ja
+license: apache-2.0
+---
+# GLuCoSE v2
+
+This model is a general Japanese text embedding model, excelling in retrieval tasks. It can run on CPU and is designed to measure semantic similarity between sentences, as well as to function as a retrieval system for searching passages based on queries.
+
+Key features:
+- Specialized for retrieval tasks, it demonstrates the highest performance among similar size  models in MIRACL and other tasks .
+- Optimized for Japanese text processing
+- Can run on CPU
+
+During inference, the prefix "query: " or "passage: " is required. Please check the Usage section for details.
+
+## Model Description
+
+The model is based on [GLuCoSE](https://huggingface.co/pkshatech/GLuCoSE-base-ja) and fine-tuned through distillation using several large-scale embedding models and multi-stage contrastive learning.
+
+- **Maximum Sequence Length:** 512 tokens
+- **Output Dimensionality:** 768 tokens
+- **Similarity Function:** Cosine Similarity
+
+## Usage
+
+### Direct Usage (Sentence Transformers)
+
+You can perform inference using SentenceTransformer with the following code:
+
+```python
+from sentence_transformers import SentenceTransformer
+import torch.nn.functional as F
+
+# Download from the 🤗 Hub
+model = SentenceTransformer("pkshatech/GLuCoSE-base-ja-v2")
+
+# Each input text should start with "query: " or "passage: ".
+# For tasks other than retrieval, you can simply use the "query: " prefix.
+sentences = [
+    'query: PKSHAはどんな会社ですか？',
+    'passage: 研究開発したアルゴリズムを、多くの企業のソフトウエア・オペレーションに導入しています。',
+    'query: 日本で一番高い山は？',
+    'passage: 富士山（ふじさん）は、標高3776.12 m、日本最高峰（剣ヶ峰）の独立峰で、その優美な風貌は日本国外でも日本の象徴として広く知られている。',
+]
+embeddings = model.encode(sentences,convert_to_tensor=True)
+print(embeddings.shape)
+# [4, 768]
+
+# Get the similarity scores for the embeddings
+similarities = F.cosine_similarity(embeddings.unsqueeze(0), embeddings.unsqueeze(1), dim=2)
+print(similarities)
+# [[1.0000, 0.6050, 0.4341, 0.5537],
+# [0.6050, 1.0000, 0.5018, 0.6815],
+# [0.4341, 0.5018, 1.0000, 0.7534],
+# [0.5537, 0.6815, 0.7534, 1.0000]]
+
+```
+
+### Direct Usage (Transformers)
+
+You can perform inference using Transformers with the following code:
+
+```python
+import torch.nn.functional as F
+from torch import Tensor
+from transformers import AutoTokenizer, AutoModel
+
+def mean_pooling(last_hidden_states: Tensor,attention_mask: Tensor) -> Tensor:
+    emb = last_hidden_states * attention_mask.unsqueeze(-1)
+    emb = emb.sum(dim=1) / attention_mask.sum(dim=1).unsqueeze(-1)
+    return emb
+
+# Download from the 🤗 Hub
+tokenizer = AutoTokenizer.from_pretrained("pkshatech/GLuCoSE-base-ja-v2")
+model = AutoModel.from_pretrained("pkshatech/GLuCoSE-base-ja-v2")
+
+# Each input text should start with "query: " or "passage: ".
+# For tasks other than retrieval, you can simply use the "query: " prefix.
+sentences = [
+    'query: PKSHAはどんな会社ですか？',
+    'passage: 研究開発したアルゴリズムを、多くの企業のソフトウエア・オペレーションに導入しています。',
+    'query: 日本で一番高い山は？',
+    'passage: 富士山（ふじさん）は、標高3776.12 m、日本最高峰（剣ヶ峰）の独立峰で、その優美な風貌は日本国外でも日本の象徴として広く知られている。',
+]
+
+# Tokenize the input texts
+batch_dict = tokenizer(sentences, max_length=512, padding=True, truncation=True, return_tensors='pt')
+
+outputs = model(**batch_dict)
+embeddings = mean_pooling(outputs.last_hidden_state, batch_dict['attention_mask'])
+print(embeddings.shape)
+# [4, 768]
+
+# Get the similarity scores for the embeddings
+similarities = F.cosine_similarity(embeddings.unsqueeze(0), embeddings.unsqueeze(1), dim=2)
+print(similarities)
+# [[1.0000, 0.6050, 0.4341, 0.5537],
+# [0.6050, 1.0000, 0.5018, 0.6815],
+# [0.4341, 0.5018, 1.0000, 0.7534],
+# [0.5537, 0.6815, 0.7534, 1.0000]]
+
+```
+
+## Training Details
+
+The fine-tuning of GLuCoSE v2 is carried out through the following steps:
+
+**Step 1: Ensemble distillation**
+
+- The embedded representation was distilled using [E5-mistral](https://huggingface.co/intfloat/e5-mistral-7b-instruct), [gte-Qwen2](https://huggingface.co/Alibaba-NLP/gte-Qwen2-7B-instruct), and [mE5-large](https://huggingface.co/intfloat/multilingual-e5-large) as teacher models.
+
+**Step 2: Contrastive learning**
+
+- Triplets were created from [JSNLI](https://nlp.ist.i.kyoto-u.ac.jp/?%E6%97%A5%E6%9C%AC%E8%AA%9ESNLI%28JSNLI%29%E3%83%87%E3%83%BC%E3%82%BF%E3%82%BB%E3%83%83%E3%83%88), [MNLI](https://huggingface.co/datasets/MoritzLaurer/multilingual-NLI-26lang-2mil7), [PAWS-X](https://huggingface.co/datasets/paws-x), [JSeM](https://github.com/DaisukeBekki/JSeM) and [Mr.TyDi](https://huggingface.co/datasets/castorini/mr-tydi) and used for training.
+- This training aimed to improve the overall performance as a sentence embedding model.
+
+**Step 3: Search-specific contrastive learning**
+
+- In order to make the model more robust to the retrieval task, additional two-stage training with QA and retrieval task was conducted.
+- In the first stage, the synthetic dataset [auto-wiki-qa](https://huggingface.co/datasets/cl-nagoya/auto-wiki-qa) was used for training,
+while in the second stage, [JQaRA](https://huggingface.co/datasets/hotchpotch/JQaRA), [MQA](https://huggingface.co/datasets/hpprc/mqa-ja), [Japanese Wikipedia Human Retrieval, Mr.TyDi,MIRACL, Quiz Works and Quiz No Mor](https://huggingface.co/datasets/hpprc/emb)i were used.
+
+<!--
+
+### Downstream Usage (Sentence Transformers)
+
+You can finetune this model on your own dataset.
+
+<details><summary>Click to expand</summary>
+
+</details>
+-->
+
+<!--
+
+### Out-of-Scope Use
+
+*List how the model may foreseeably be misused and address what users ought not to do with the model.*
+-->
+
+<!--
+
+## Bias, Risks and Limitations
+
+*What are the known or foreseeable issues stemming from this model? You could also flag here known failure cases or weaknesses of the model.*
+-->
+
+<!--
+
+### Recommendations
+
+*What are recommendations with respect to the foreseeable issues? For example, filtering explicit content.*
+-->
+
+## Benchmarks
+
+### Retrieval
+
+Evaluated with [MIRACL-ja](https://huggingface.co/datasets/miracl/miracl), [JQARA](https://huggingface.co/datasets/hotchpotch/JQaRA) , [JaCWIR](https://huggingface.co/datasets/hotchpotch/JaCWIR) and [MLDR-ja](https://huggingface.co/datasets/Shitao/MLDR).
+
+| Model | Size | MIRACL<br>Recall@5 | JQaRA<br>nDCG@10 | JaCWIR<br>MAP@10 | MLDR<br>nDCG@10 |
+| :---: | :---: | :---: | :---: | :---: | :---: |
+| [intfloat/multilingual-e5-large](https://huggingface.co/intfloat/multilingual-e5-large) | 0.6B | 89.2 | 55.4 | **87.6** | 29.8 |
+| [cl-nagoya/ruri-large](https://huggingface.co/cl-nagoya/ruri-large) | 0.3B | 78.7 | 62.4 | 85.0 | **37.5** |
+|  |  |  |  |  |  |
+| [intfloat/multilingual-e5-base](https://huggingface.co/intfloat/multilingual-e5-base) | 0.3B | 84.2 | 47.2 | **85.3** | 25.4 |
+| [cl-nagoya/ruri-base](https://huggingface.co/cl-nagoya/ruri-base) | 0.1B | 74.3 | 58.1 | 84.6 | **35.3** |
+| [pkshatech/GLuCoSE-base-ja](https://huggingface.co/pkshatech/GLuCoSE-base-ja) | 0.1B | 53.3 | 30.8 | 68.6 | 25.2 |
+| **GLuCoSE v2** | 0.1B | **85.5** | **60.6** | **85.3** | 33.8 |
+
+Note: Results for OpenAI small embeddings in JQARA and JaCWIR are quoted from the [JQARA](https://huggingface.co/datasets/hotchpotch/JQaRA) and [JaCWIR](https://huggingface.co/datasets/hotchpotch/JaCWIR).
+
+### JMTEB
+
+Evaluated with [JMTEB](https://github.com/sbintuitions/JMTEB).
+The average score is macro-average.
+| Model | Size | Avg. | Retrieval | STS | Classification | Reranking | Clustering | PairClassification |
+| :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
+| OpenAI/text-embedding-3-small | - | 69.18 | 66.39 | 79.46 | 73.06 | 92.92 | 51.06 | 62.27 |
+| OpenAI/text-embedding-3-large | - | 74.05 | 74.48 | 82.52 | 77.58 | 93.58 | 53.32 | 62.35 |
+|  |  |  |  |  |  |  |  |  |
+| [intfloat/multilingual-e5-large](https://huggingface.co/intfloat/multilingual-e5-large) | 0.6B | 70.90 | 70.98 | 79.70 | 72.89 | 92.96 | 51.24 | 62.15 |
+| [cl-nagoya/ruri-large](https://huggingface.co/cl-nagoya/ruri-large) | 0.3B | 73.31 | 73.02 | 83.13 | 77.43 | 92.99 | 51.82 | 62.29 |
+|  |  |  |  |  |  |  |  |  |
+| [intfloat/multilingual-e5-base](https://huggingface.co/intfloat/multilingual-e5-base) | 0.3B | 68.61 | 68.21 | 79.84 | 69.30 | **92.85** | 48.26 | 62.26 |
+| [cl-nagoya/ruri-base](https://huggingface.co/cl-nagoya/ruri-base) | 0.1B | 71.91 | 69.82 | 82.87 | 75.58 | 92.91 | **54.16** | 62.38 |
+| [pkshatech/GLuCoSE-base-ja](https://huggingface.co/pkshatech/GLuCoSE-base-ja) | 0.1B | 67.29 | 59.02 | 78.71 | **76.82** | 91.90 | 49.78 | **66.39** |
+| **GLuCoSE v2** | 0.1B | **72.23** | **73.36** | **82.96** | 74.21 | 93.01 | 48.65 | 62.37 |
+
+Note: Results for OpenAI embeddings and multilingual-e5 models are quoted from the [JMTEB leaderboard](https://github.com/sbintuitions/JMTEB/blob/main/leaderboard.md). Results for ruri are quoted from the [cl-nagoya/ruri-base model card](https://huggingface.co/cl-nagoya/ruri-base/blob/main/README.md).
+
+## Authors
+
+Chihiro Yano, Mocho Go, Hideyuki Tachibana, Hiroto Takegawa, Yotaro Watanabe
+
+## License
+
+This model is published under the [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0).
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+  "mask_token": "<mask>",
+  "max_entity_length": 32,
+  "max_mention_length": 30,
+  "model_max_length": 512,
+  "pad_token": "<pad>",
+  "sep_token": "</s>",
+  "sp_model_kwargs": {},
+  "task": null,
+  "tokenizer_class": "MLukeTokenizer",
+  "unk_token": "<unk>"
+}