Sentence Similarity
sentence-transformers
Safetensors
Transformers
Japanese
llama
feature-extraction
mirei
llm2vec
text-embedding
embeddings
retrieval
custom_code
text-embeddings-inference
Instructions to use iamtatsuki05/Sentence-Sarashina-Bi-0.5B with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- sentence-transformers
How to use iamtatsuki05/Sentence-Sarashina-Bi-0.5B with sentence-transformers:
from sentence_transformers import SentenceTransformer model = SentenceTransformer("iamtatsuki05/Sentence-Sarashina-Bi-0.5B", trust_remote_code=True) sentences = [ "The weather is lovely today.", "It's so sunny outside!", "He drove to the stadium." ] embeddings = model.encode(sentences) similarities = model.similarity(embeddings, embeddings) print(similarities.shape) # [3, 3] - Transformers
How to use iamtatsuki05/Sentence-Sarashina-Bi-0.5B with Transformers:
# Load model directly from transformers import AutoTokenizer, AutoModel tokenizer = AutoTokenizer.from_pretrained("iamtatsuki05/Sentence-Sarashina-Bi-0.5B", trust_remote_code=True) model = AutoModel.from_pretrained("iamtatsuki05/Sentence-Sarashina-Bi-0.5B", trust_remote_code=True, device_map="auto") - Notebooks
- Google Colab
- Kaggle
File size: 4,290 Bytes
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language:
- ja
license: mit
library_name: sentence-transformers
pipeline_tag: sentence-similarity
tags:
- mirei
- llama
- transformers
- llm2vec
- text-embedding
- embeddings
- feature-extraction
- retrieval
base_model: iamtatsuki05/Sentence-Sarashina-Bi-0.5B-PT
datasets:
- cl-nagoya/ruri-v3-dataset-ft
---
# Sentence-Sarashina-Bi-0.5B
[English](README.md) / Japanese
## Overview
Sentence-Sarashina-Bi-0.5B は、 [iamtatsuki05/Sentence-Sarashina-Bi-0.5B-PT](https://huggingface.co/iamtatsuki05/Sentence-Sarashina-Bi-0.5B-PT) を [cl-nagoya/ruri-v3-dataset-ft](https://huggingface.co/datasets/cl-nagoya/ruri-v3-dataset-ft) で教師あり対照学習を行った 1280 次元の日本語埋め込みモデルです。
- **[Hugging Face Collection](https://huggingface.co/collections/iamtatsuki05/mirei)**
- **[GitHub](https://github.com/iamtatsuki05/MIREI)**

## Usage
### Requirements
```
sentence-transformers>=4.1.0
transformers>=4.51.0
accelerate>=1.6.0
sentencepiece>=0.2.0
flash-attn>=2.7.3
```
### Sample Code
```python
import torch
from sentence_transformers import SentenceTransformer
model_name = "iamtatsuki05/Sentence-Sarashina-Bi-0.5B"
model_kwargs = {
"torch_dtype": torch.bfloat16,
"attn_implementation": "flash_attention_2",
}
model = SentenceTransformer(model_name, model_kwargs=model_kwargs)
queries = ["ハチワレはどのようなキャラクターですか?"]
docs = [
"ハチワレは、『ちいかわ』に登場する猫風のキャラクターで、明るく社交的、前向きな性格が特徴。ちいかわたちと共に日常を楽しみつつ、討伐などの冒険にも積極的に挑む存在です。",
"うさぎは、天真爛漫でマイペースな性格が特徴のキャラクターで、突飛な行動力と鋭い直感でちいかわたちを引っ張る存在。自由気ままながらも仲間思いな一面を併せ持ちます。",
]
q_emb = model.encode(queries, normalize_embeddings=True)
d_emb = model.encode(docs, normalize_embeddings=True)
scores = model.similarity(q_emb, d_emb)
print(scores)
```
## Model Details
- **ベースモデル:** [iamtatsuki05/Sentence-Sarashina-Bi-0.5B-PT](https://huggingface.co/iamtatsuki05/Sentence-Sarashina-Bi-0.5B-PT)
- **アーキテクチャ:** Llama
- **最大シーケンス長:** 8,192トークン
- **埋め込み次元:** 1280(Mean Pooling)
- **トークナイザ:** SentencePiece / 語彙数 102,400
- **位置エンコーディング:** RoPE
- **対応言語:** 日本語
- **類似度指標:** cosine
## Model Series
弱教師あり学習済みモデルに対して [cl-nagoya/ruri-v3-dataset-ft](https://huggingface.co/datasets/cl-nagoya/ruri-v3-dataset-ft) で教師あり学習したモデル群です。
| ID | Architecture | #Param. | #Param.<br>w/o Emb. | JMTEB-Avg | JMTEB-Retrieval | JMTEB-STS | JMTEB-Classification | JMTEB-Reranking | JMTEB-Clustering |
|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|
| [iamtatsuki05/Sentence-ModernBERT-JP-0.5B](https://huggingface.co/iamtatsuki05/Sentence-ModernBERT-JP-0.5B) | ModernBERT | 679M | 548M | 65.31 | 57.95 | 80.78 | 71.73 | 75.50 | **50.03** |
| [iamtatsuki05/Sentence-Llama-Bi-JP-0.5B](https://huggingface.co/iamtatsuki05/Sentence-Llama-Bi-JP-0.5B) | Llama | 661M | 530M | 61.02 | 51.55 | 78.01 | 68.51 | 71.96 | 48.69 |
| [iamtatsuki05/Sentence-Sarashina-Bi-0.5B](https://huggingface.co/iamtatsuki05/Sentence-Sarashina-Bi-0.5B)<br>(this model) | Llama | 661M | 530M | **66.84** | **59.00** | **83.50** | **74.35** | **77.36** | 49.40 |
## Licence
このモデルは [MIT](https://licenses.opensource.jp/MIT/MIT.html) でライセンスされています。
## How to Cite
```tex
@article{MIREI
title={同一条件下における Encoder/Decoder アーキテクチャによる文埋め込みの性能分析},
author={岡田 龍樹 and 杉本 徹},
journal={言語処理学会第 32 回年次大会 (NLP2026)},
year={2026}
}
```
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