qwen3-embed-4b GGUF

GGUF format of Qwen/Qwen3-Embedding-4B for use with CrispEmbed.

Qwen3 Embedding 4B. Official Alibaba embedding model, 2560-dimensional last-token pooling.

Files

File Quantization Size
qwen3-embed-4b-q4_k.gguf Q4_K 2349 MB
qwen3-embed-4b-q5_k.gguf Q5_K 2782 MB
qwen3-embed-4b-q8_0.gguf Q8_0 4081 MB
qwen3-embed-4b.gguf F32 15348 MB

Parity vs HuggingFace reference

Cosine similarity vs the upstream sentence-transformers reference on a fixed test set (text):

Quant Text
q4_k 0.9744

Note: below the 0.99 retrieval-quality bar โ€” text: q4_k (0.974). Embeddings are still functionally usable (>0.9 = directionally correct for similarity ranking) but expect small differences in nearest-neighbor results vs the upstream f32 reference.

Quick Start

# Download
huggingface-cli download cstr/qwen3-embed-4b-GGUF qwen3-embed-4b-q4_k.gguf --local-dir .

# Run with CrispEmbed
./crispembed -m qwen3-embed-4b-q4_k.gguf "Hello world"

# Or with auto-download
./crispembed -m qwen3-embed-4b "Hello world"

Model Details

Property Value
Architecture Qwen3
Parameters 4B
Embedding Dimension 2560
Layers 36
Pooling last-token
Tokenizer GPT-2 BPE
Base Model Qwen/Qwen3-Embedding-4B

Verification

Verified bit-identical to HuggingFace sentence-transformers (cosine similarity >= 0.999 on test texts).

Usage with CrispEmbed

CrispEmbed is a lightweight C/C++ text embedding inference engine using ggml. No Python runtime, no ONNX. Supports BERT, XLM-R, Qwen3, and Gemma3 architectures.

# Build CrispEmbed
git clone https://github.com/CrispStrobe/CrispEmbed
cd CrispEmbed
cmake -S . -B build && cmake --build build -j

# Encode
./build/crispembed -m qwen3-embed-4b-q4_k.gguf "query text"

# Server mode
./build/crispembed-server -m qwen3-embed-4b-q4_k.gguf --port 8080
curl -X POST http://localhost:8080/v1/embeddings \
    -d '{"input": ["Hello world"], "model": "qwen3-embed-4b"}'

Credits

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