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Cataloged from perplexity-ai/pplx-embed-v1-0.6b
All models by perplexity-ai →[Image blocked: Perplexity Logo]
pplx-embed-v1: Diffusion-Pretrained Dense and Contextual Embeddings
pplx-embed-v1 and pplx-embed-context-v1 are state-of-the-art text embedding models optimized for real-world, web-scale retrieval tasks.
pplx-embed-v1 for independent text embedding (queries, documents, semantic search)pplx-embed-context-v1 for document chunks in RAG systems where surrounding context matters[!IMPORTANT]
pplx-embed-v1andpplx-embed-context-v1natively produce unnormalized int8-quantized embeddings. Ensure that you compare them via cosine similarity.
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All models are built on diffusion continued pre-trained Qwen3 at Perplexity AI.
Many modern embedding models rely on instruction tuning, where users prepend an instruction string to the text being embedded. This can yield a 2%-3% lift on benchmarks, but it also introduces prompt-selection overhead and can make indexing pipelines brittle (small instruction changes can shift embedding space). We deliberately avoid this requirement: you can embed the text you want to index directly, without having to choose or maintain an instruction prefix.
[!NOTE] Text Embeddings Inference v1.9.2+ is required.
[!IMPORTANT] Currently, only int8-quantized embeddings are available via TEI. Remember to use cosine similarity with unnormalized int8 embeddings.
If you hit OOM during warmup, lower --max-batch-tokens and --max-client-batch-size. Set --max-batch-tokens to max_sequence_length × batch_size (e.g., 2048 tokens × 8 sequences = 16384).
Alternatively, when running in CUDA you can use the architecture / compute capability specific container instead of the
cuda-1.9, as that includes the binaries for Turing, Ampere, Hopper and Blackwell, so using a dedicated container will be lighter e.g.,ampere-1.9.
And then you can send requests to it via cURL to /embed:
For comprehensive technical details and evaluation results, see our paper on arXiv: https://arxiv.org/abs/2602.11151.
curl -X POST https://api.perplexity.ai/v1/embeddings \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "input": [ "Scientists explore the universe driven by curiosity.", "Children learn through curious exploration.", "Historical discoveries began with curious questions.", "Animals use curiosity to adapt and survive.", "Philosophy examines the nature of curiosity." ], "model": "pplx-embed-v1-0.6b" }'from sentence_transformers import SentenceTransformer
model = SentenceTransformer( "perplexity-ai/pplx-embed-v1-0.6B", trust_remote_code=True)
texts = [ "Scientists explore the universe driven by curiosity.", "Children learn through curious exploration.", "Historical discoveries began with curious questions.", "Animals use curiosity to adapt and survive.", "Philosophy examines the nature of curiosity.",]
embeddings = model.encode(texts) # Shape: (5, 1024), quantized to int8embeddings = model.encode(texts, quantization="binary") # Shape: (5, 1024), quantized to binary
import onnxruntime as ortfrom transformers import AutoTokenizerimport numpy as np
tokenizer = AutoTokenizer.from_pretrained("perplexity-ai/pplx-embed-v1-0.6b", trust_remote_code=True)session = ort.InferenceSession("onnx/model.onnx")
texts = [ "Scientists explore the universe driven by curiosity.", "Children learn through curious exploration.", "Historical discoveries began with curious questions.", "Animals use curiosity to adapt and survive.", "Philosophy examines the nature of curiosity.",]
tokenized = tokenizer( texts, padding=True, truncation=True, return_tensors="np")
onnx_inputs = { "input_ids": tokenized["input_ids"].astype(np.int64), "attention_mask": tokenized["attention_mask"].astype(np.int64),}
# Run inferenceonnx_embeddings = session.run([out.name for out in session.get_outputs()], onnx_inputs)
# ONNX produces both int8 and binary precision embeddings:int8_embeddings = onnx_embeddings[2]binary_embeddings = onnx_embeddings[3]packed_embeddings = np.packbits(binary_embeddings != -1, axis=-1)docker run -p 8080:80 ghcr.io/huggingface/text-embeddings-inference:cpu-1.9 --model-id perplexity-ai/pplx-embed-v1-0.6B --dtype float32docker run -p 8080:80 ghcr.io/huggingface/text-embeddings-inference:cpu-1.9 --model-id onnx-community/pplx-embed-v1-0.6B --dtype float32docker run --gpus all --shm-size 1g -p 8080:80 ghcr.io/huggingface/text-embeddings-inference:cuda-1.9 --model-id perplexity-ai/pplx-embed-v1-0.6B --dtype float32curl http://0.0.0.0:8080/embed \ -H "Content-Type: application/json" \ -d '{ "inputs": [ "Scientists explore the universe driven by curiosity.", "Children learn through curious exploration.", "Historical discoveries began with curious questions.", "Animals use curiosity to adapt and survive.", "Philosophy examines the nature of curiosity." ], "normalize": false }'