LangChain

pip install langchain langchain-openai

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="claude-opus-4-8",                     # 精确名称见价格页
    api_key="sk-你的密钥",
    base_url="https://www.ruapi.ai/v1",  # 带 /v1
)

print(llm.invoke("你好!用一句话回答。").content)

npm install @langchain/openai @langchain/core

import { ChatOpenAI } from "@langchain/openai";

const llm = new ChatOpenAI({
  model: "claude-opus-4-8",
  apiKey: "sk-你的密钥",
  configuration: { baseURL: "https://www.ruapi.ai/v1" },
});

const res = await llm.invoke("你好!用一句话回答。");
console.log(res.content);

from langchain_openai import OpenAIEmbeddings

embeddings = OpenAIEmbeddings(
    model="text-embedding-3-small",       # 或目录里其他嵌入模型
    api_key="sk-你的密钥",
    base_url="https://www.ruapi.ai/v1",
)