如果你在 Colab 中打开这个 Notebook，可能需要先安装 LlamaIndex 🦙。

%pip install llama-index-embeddings-openai

!pip install llama-index

import os

os.environ["OPENAI_API_KEY"] = "sk-..."

from llama_index.embeddings.openai import OpenAIEmbedding
from llama_index.core import Settings

embed_model = OpenAIEmbedding(embed_batch_size=10)
Settings.embed_model = embed_model

使用 OpenAI text-embedding-3-large 和 text-embedding-3-small

注意，你可能需要更新 openai 客户端：pip install -U openai

# get API key and create embeddings
from llama_index.embeddings.openai import OpenAIEmbedding

embed_model = OpenAIEmbedding(model="text-embedding-3-large")

embeddings = embed_model.get_text_embedding(
    "Open AI new Embeddings models is great."
)

print(embeddings[:5])

[-0.011500772088766098, 0.02457442320883274, -0.01760469563305378, -0.017763426527380943, 0.029841400682926178]

print(len(embeddings))

3072

# get API key and create embeddings
from llama_index.embeddings.openai import OpenAIEmbedding

embed_model = OpenAIEmbedding(
    model="text-embedding-3-small",
)

embeddings = embed_model.get_text_embedding(
    "Open AI new Embeddings models is awesome."
)

print(len(embeddings))

1536

更改输出嵌入的维度

注意：请确保你使用的是最新的 OpenAI 客户端

# get API key and create embeddings
from llama_index.embeddings.openai import OpenAIEmbedding

embed_model = OpenAIEmbedding(
    model="text-embedding-3-large",
    dimensions=512,
)

embeddings = embed_model.get_text_embedding(
    "Open AI new Embeddings models with different dimensions is awesome."
)
print(len(embeddings))

512