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dengcao/
Qwen3-Embedding-4B

Name: Qwen3-Embedding-4B
Availability: InStock

sentence-transformers

text-embeddings-inference

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2025年7月8日更新说明

替换并更新成Vllm官方的最新镜像：dengcao/vllm-openai: v0.9.2。此镜像与vllm官方保持一致，可放心使用。

更新方法： 1、重新下载docker-compose.yaml文件覆盖旧文件。2、删除对应容器后，cd切换到项目根目录，重新执行：docker compose up -d

2025年7月7日更新说明

使用了Vllm最新的包（v0.9.2rc2）更新了Docker镜像：dengcao/vllm-openai: v0.9.2rc2。

更新方法： 1、重新下载docker-compose.yaml文件覆盖旧文件。2、删除对应容器后，cd切换到项目根目录，重新执行：docker compose up -d

使用说明

·本项目为Docker一键部署安装包，旨在解决Qwen3-Embedding-4B模型无法通过Vllm平台直接部署的问题，方便新手朋友快速通过Docker一键部署。

·采用vllm最新的开发版制作了Docker镜像dengcao/vllm-openai: v0.9.2-dev，经测试正常，可放心使用。

自从Qwen3-Embedding/Qwen3-Reranker系列模型发布以来，迅速在向量嵌入模型和重排模型中掀起了使用热潮，但遗憾的是，许多新手朋友无法正常使用Vllm部署Qwen3-Embedding-4B模型，会遇到各种各样的问题。于是，特意做了这个一键部署包，方便大家使用。

Docker desktop（Windows用户）使用方法如下：

（前提是先在windows部署好Docker desktop）

1、下载本项目到windows任意目录。比如：C:\Users\Administrator\vLLM。

2、打开：Windows PowerShell，输入：wsl，确定后进入WSL。依次执行下列命令：

cd /mnt/c/Users/Administrator/vLLM

docker compose up -d

等待下载docker镜像和加载容器完成即可。

当然以上命令也可以直接在windows命令窗口这样执行：

cd C:\Users\Administrator\vLLM

docker compose up -d

Linux用户的Docker版本，可参考以上方法。

调用Qwen3-Embedding-4B模型API接口：

Docker内的容器APP调用：

API请求地址：http://host.docker.internal:8008/v1/embeddings

请求Key：NOT_NEED

Docker外部的APP调用：

API请求地址：http://localhost:8008/v1/embeddings

请求Key：NOT_NEED

此方法已经在FastGPT上测试通过，可正常Embedding向量嵌入。

Qwen3-Embedding-4B

Highlights

The Qwen3 Embedding model series is the latest proprietary model of the Qwen family, specifically designed for text embedding and ranking tasks. Building upon the dense foundational models of the Qwen3 series, it provides a comprehensive range of text embeddings and reranking models in various sizes (0.6B, 4B, and 8B). This series inherits the exceptional multilingual capabilities, long-text understanding, and reasoning skills of its foundational model. The Qwen3 Embedding series represents significant advancements in multiple text embedding and ranking tasks, including text retrieval, code retrieval, text classification, text clustering, and bitext mining.

Exceptional Versatility: The embedding model has achieved state-of-the-art performance across a wide range of downstream application evaluations. The 8B size embedding model ranks No.1 in the MTEB multilingual leaderboard (as of June 5, 2025, score 70.58), while the reranking model excels in various text retrieval scenarios.

Comprehensive Flexibility: The Qwen3 Embedding series offers a full spectrum of sizes (from 0.6B to 8B) for both embedding and reranking models, catering to diverse use cases that prioritize efficiency and effectiveness. Developers can seamlessly combine these two modules. Additionally, the embedding model allows for flexible vector definitions across all dimensions, and both embedding and reranking models support user-defined instructions to enhance performance for specific tasks, languages, or scenarios.

Multilingual Capability: The Qwen3 Embedding series offer support for over 100 languages, thanks to the multilingual capabilites of Qwen3 models. This includes various programming languages, and provides robust multilingual, cross-lingual, and code retrieval capabilities.

Model Overview

Qwen3-Embedding-4B has the following features:

Model Type: Text Embedding
Supported Languages: 100+ Languages
Number of Paramaters: 4B
Context Length: 32k
Embedding Dimension: Up to 2560, supports user-defined output dimensions ranging from 32 to 2560

For more details, including benchmark evaluation, hardware requirements, and inference performance, please refer to our blog, GitHub.

Qwen3 Embedding Series Model list

Model Type	Models	Size	Layers	Sequence Length	Embedding Dimension	MRL Support	Instruction Aware
Text Embedding	Qwen3-Embedding-0.6B	0.6B	28	32K	1024	Yes	Yes
Text Embedding	Qwen3-Embedding-4B	4B	36	32K	2560	Yes	Yes
Text Embedding	Qwen3-Embedding-8B	8B	36	32K	4096	Yes	Yes
Text Reranking	Qwen3-Reranker-0.6B	0.6B	28	32K	-	-	Yes
Text Reranking	Qwen3-Reranker-4B	4B	36	32K	-	-	Yes
Text Reranking	Qwen3-Reranker-8B	8B	36	32K	-	-	Yes

Note:

MRL Support indicates whether the embedding model supports custom dimensions for the final embedding.

Instruction Aware notes whether the embedding or reranking model supports customizing the input instruction according to different tasks.

Our evaluation indicates that, for most downstream tasks, using instructions (instruct) typically yields an improvement of 1% to 5% compared to not using them. Therefore, we recommend that developers create tailored instructions specific to their tasks and scenarios. In multilingual contexts, we also advise users to write their instructions in English, as most instructions utilized during the model training process were originally written in English.

Usage

With Transformers versions earlier than 4.51.0, you may encounter the following error:

KeyError: 'qwen3'

Sentence Transformers Usage

python

# Requires transformers>=4.51.0
# Requires sentence-transformers>=2.7.0

from sentence_transformers import SentenceTransformer

# Load the model
model = SentenceTransformer("Qwen/Qwen3-Embedding-4B")

# We recommend enabling flash_attention_2 for better acceleration and memory saving,
# together with setting `padding_side` to "left":
# model = SentenceTransformer(
#     "Qwen/Qwen3-Embedding-4B",
#     model_kwargs={"attn_implementation": "flash_attention_2", "device_map": "auto"},
#     tokenizer_kwargs={"padding_side": "left"},
# )

# The queries and documents to embed
queries = [
    "What is the capital of China?",
    "Explain gravity",
]
documents = [
    "The capital of China is Beijing.",
    "Gravity is a force that attracts two bodies towards each other. It gives weight to physical objects and is responsible for the movement of planets around the sun.",
]

# Encode the queries and documents. Note that queries benefit from using a prompt
# Here we use the prompt called "query" stored under `model.prompts`, but you can
# also pass your own prompt via the `prompt` argument
query_embeddings = model.encode(queries, prompt_name="query")
document_embeddings = model.encode(documents)

# Compute the (cosine) similarity between the query and document embeddings
similarity = model.similarity(query_embeddings, document_embeddings)
print(similarity)
# tensor([[0.7534, 0.1147],
#         [0.0320, 0.6258]])

Transformers Usage

python

# Requires transformers>=4.51.0
import torch
import torch.nn.functional as F

from torch import Tensor
from transformers import AutoTokenizer, AutoModel


def last_token_pool(last_hidden_states: Tensor,
                 attention_mask: Tensor) -> Tensor:
    left_padding = (attention_mask[:, -1].sum() == attention_mask.shape[0])
    if left_padding:
        return last_hidden_states[:, -1]
    else:
        sequence_lengths = attention_mask.sum(dim=1) - 1
        batch_size = last_hidden_states.shape[0]
        return last_hidden_states[torch.arange(batch_size, device=last_hidden_states.device), sequence_lengths]


def get_detailed_instruct(task_description: str, query: str) -> str:
    return f'Instruct: {task_description}\nQuery:{query}'

# Each query must come with a one-sentence instruction that describes the task
task = 'Given a web search query, retrieve relevant passages that answer the query'

queries = [
    get_detailed_instruct(task, 'What is the capital of China?'),
    get_detailed_instruct(task, 'Explain gravity')
]
# No need to add instruction for retrieval documents
documents = [
    "The capital of China is Beijing.",
    "Gravity is a force that attracts two bodies towards each other. It gives weight to physical objects and is responsible for the movement of planets around the sun."
]
input_texts = queries + documents

tokenizer = AutoTokenizer.from_pretrained('Qwen/Qwen3-Embedding-4B', padding_side='left')
model = AutoModel.from_pretrained('Qwen/Qwen3-Embedding-4B')

# We recommend enabling flash_attention_2 for better acceleration and memory saving.
# model = AutoModel.from_pretrained('Qwen/Qwen3-Embedding-4B', attn_implementation="flash_attention_2", torch_dtype=torch.float16).cuda()

max_length = 8192

# Tokenize the input texts
batch_dict = tokenizer(
    input_texts,
    padding=True,
    truncation=True,
    max_length=max_length,
    return_tensors="pt",
)
batch_dict.to(model.device)
outputs = model(**batch_dict)
embeddings = last_token_pool(outputs.last_hidden_state, batch_dict['attention_mask'])

# normalize embeddings
embeddings = F.normalize(embeddings, p=2, dim=1)
scores = (embeddings[:2] @ embeddings[2:].T)
print(scores.tolist())
# [[0.7534257769584656, 0.1146894246339798], [0.03198453038930893, 0.6258305311203003]]

vLLM Usage

python

# Requires vllm>=0.8.5
import torch
import vllm
from vllm import LLM

def get_detailed_instruct(task_description: str, query: str) -> str:
    return f'Instruct: {task_description}\nQuery:{query}'

# Each query must come with a one-sentence instruction that describes the task
task = 'Given a web search query, retrieve relevant passages that answer the query'

queries = [
    get_detailed_instruct(task, 'What is the capital of China?'),
    get_detailed_instruct(task, 'Explain gravity')
]
# No need to add instruction for retrieval documents
documents = [
    "The capital of China is Beijing.",
    "Gravity is a force that attracts two bodies towards each other. It gives weight to physical objects and is responsible for the movement of planets around the sun."
]
input_texts = queries + documents

model = LLM(model="Qwen/Qwen3-Embedding-4B", task="embed")

outputs = model.embed(input_texts)
embeddings = torch.tensor([o.outputs.embedding for o in outputs])
scores = (embeddings[:2] @ embeddings[2:].T)
print(scores.tolist())
# [[0.7525103688240051, 0.1143278032541275], [0.030893627554178238, 0.6239761114120483]]

📌 Tip: We recommend that developers customize the instruct according to their specific scenarios, tasks, and languages. Our tests have shown that in most retrieval scenarios, not using an instruct on the query side can lead to a drop in retrieval performance by approximately 1% to 5%.

Text Embeddings Inference (TEI) Usage

You can either run / deploy TEI on NVIDIA GPUs as:

docker run --gpus all -p 8080:80 -v hf_cache:/data --pull always ghcr.io/huggingface/text-embeddings-inference:1.7.2 --model-id Qwen/Qwen3-Embedding-4B --dtype float16

Or on CPU devices as:

docker run -p 8080:80 -v hf_cache:/data --pull always ghcr.io/huggingface/text-embeddings-inference:cpu-1.7.2 --model-id Qwen/Qwen3-Embedding-4B --dtype float16

And then, generate the embeddings sending a HTTP POST request as:

bash

curl http://localhost:8080/embed \
    -X POST \
    -d '{"inputs": ["Instruct: Given a web search query, retrieve relevant passages that answer the query\nQuery: What is the capital of China?", "Instruct: Given a web search query, retrieve relevant passages that answer the query\nQuery: Explain gravity"]}' \
    -H "Content-Type: application/json"

Evaluation

MTEB (Multilingual)

Model	Size	Mean (Task)	Mean (Type)	Bitxt Mining	Class.	Clust.	Inst. Retri.	Multi. Class.	Pair. Class.	Rerank	Retri.	STS
NV-Embed-v2	7B	56.29	49.58	57.84	57.29	40.80	1.04	18.63	78.94	63.82	56.72	71.10
GritLM-7B	7B	60.92	53.74	70.53	61.83	49.75	3.45	22.77	79.94	63.78	58.31	73.33
BGE-M3	0.6B	59.56	52.18	79.11	60.35	40.88	-3.11	20.1	80.76	62.79	54.60	74.12
multilingual-e5-large-instruct	0.6B	63.22	55.08	80.13	64.94	50.75	-0.40	22.91	80.86	62.61	57.12	76.81
gte-Qwen2-1.5B-instruct	1.5B	59.45	52.69	62.51	58.32	52.05	0.74	24.02	81.58	62.58	60.78	71.61
gte-Qwen2-7b-Instruct	7B	62.51	55.93	73.92	61.55	52.77	4.94	25.48	85.13	65.55	60.08	73.98
text-embedding-3-large	-	58.93	51.41	62.17	60.27	46.89	-2.68	22.03	79.17	63.89	59.27	71.68
Cohere-embed-multilingual-v3.0	-	61.12	53.23	70.50	62.95	46.89	-1.89	22.74	79.88	64.07	59.16	74.80
gemini-embedding-exp-03-07	-	68.37	59.59	79.28	71.82	54.59	5.18	29.16	83.63	65.58	67.71	79.40
Qwen3-Embedding-0.6B	0.6B	64.33	56.00	72.22	66.83	52.33	5.09	24.59	80.83	61.41	64.64	76.17
Qwen3-Embedding-4B	4B	69.45	60.86	79.36	72.33	57.15	11.56	26.77	85.05	65.08	69.60	80.86
Qwen3-Embedding-8B	8B	70.58	61.69	80.89	74.00	57.65	10.06	28.66	86.40	65.63	70.88	81.08

Note: For compared models, the scores are retrieved from MTEB online leaderboard on May 24th, 2025.

MTEB (Eng v2)

MTEB English / Models	Param.	Mean(Task)	Mean(Type)	Class.	Clust.	Pair Class.	Rerank.	Retri.	STS	Summ.
multilingual-e5-large-instruct	0.6B	65.53	61.21	75.54	49.89	86.24	48.74	53.47	84.72	29.89
NV-Embed-v2	7.8B	69.81	65.00	87.19	47.66	88.69	49.61	62.84	83.82	35.21
GritLM-7B	7.2B	67.07	63.22	81.25	50.82	87.29	49.59	54.95	83.03	35.65
gte-Qwen2-1.5B-instruct	1.5B	67.20	63.26	85.84	53.54	87.52	49.25	50.25	82.51	33.94
stella_en_1.5B_v5	1.5B	69.43	65.32	89.38	57.06	88.02	50.19	52.42	83.27	36.91
gte-Qwen2-7B-instruct	7.6B	70.72	65.77	88.52	58.97	85.9	50.47	58.09	82.69	35.74
gemini-embedding-exp-03-07	-	73.3	67.67	90.05	59.39	87.7	48.59	64.35	85.29	38.28
Qwen3-Embedding-0.6B	0.6B	70.70	64.88	85.76	54.05	84.37	48.18	61.83	86.57	33.43
Qwen3-Embedding-4B	4B	74.60	68.10	89.84	57.51	87.01	50.76	68.46	88.72	34.39
Qwen3-Embedding-8B	8B	75.22	68.71	90.43	58.57	87.52	51.56	69.44	88.58	34.83

C-MTEB (MTEB Chinese)

C-MTEB	Param.	Mean(Task)	Mean(Type)	Class.	Clust.	Pair Class.	Rerank.	Retr.	STS
multilingual-e5-large-instruct	0.6B	58.08	58.24	69.80	48.23	64.52	57.45	63.65	45.81
bge-multilingual-gemma2	9B	67.64	68.52	75.31	59.30	86.67	68.28	73.73	55.19
gte-Qwen2-1.5B-instruct	1.5B	67.12	67.79	72.53	54.61	79.5	68.21	71.86	60.05
gte-Qwen2-7B-instruct	7.6B	71.62	72.19	75.77	66.06	81.16	69.24	75.70	65.20
ritrieve_zh_v1	0.3B	72.71	73.85	76.88	66.5	85.98	72.86	76.97	63.92
Qwen3-Embedding-0.6B	0.6B	66.33	67.45	71.40	68.74	76.42	62.58	71.03	54.52
Qwen3-Embedding-4B	4B	72.27	73.51	75.46	77.89	83.34	66.05	77.03	61.26
Qwen3-Embedding-8B	8B	73.84	75.00	76.97	80.08	84.23	66.99	78.21	63.53

Citation

If you find our work helpful, feel free to give us a cite.

@article{qwen3embedding,
  title={Qwen3 Embedding: Advancing Text Embedding and Reranking Through Foundation Models},
  author={Zhang, Yanzhao and Li, Mingxin and Long, Dingkun and Zhang, Xin and Lin, Huan and Yang, Baosong and Xie, Pengjun and Yang, An and Liu, Dayiheng and Lin, Junyang and Huang, Fei and Zhou, Jingren},
  journal={arXiv preprint arXiv:2506.05176},
  year={2025}
}

dengcao/Qwen3-Embedding-4B

2025年7月8日 更新说明

2025年7月7日 更新说明

使用说明

Docker desktop（Windows用户）使用方法如下：

当然以上命令也可以直接在windows命令窗口这样执行：

Linux用户的Docker版本，可参考以上方法。

调用Qwen3-Embedding-4B模型API接口：

Docker内的容器APP调用：

Docker外部的APP调用：

此方法已经在FastGPT上测试通过，可正常Embedding向量嵌入。

Qwen3-Embedding-4B

Highlights

Model Overview

Qwen3 Embedding Series Model list

Usage

Sentence Transformers Usage

Transformers Usage

vLLM Usage

Text Embeddings Inference (TEI) Usage

Evaluation

MTEB (Multilingual)

MTEB (Eng v2)

C-MTEB (MTEB Chinese)

Citation

dengcao/
Qwen3-Embedding-4B

2025年7月8日更新说明

2025年7月7日更新说明