> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-zh.cn/llms.txt
> Use this file to discover all available pages before exploring further.
# OpenAI 集成
> 使用 LangChain JavaScript 与 OpenAI 大语言模型集成。
**您当前浏览的是 OpenAI 文本补全模型的文档页面。最新且最受欢迎的 OpenAI 模型是 [聊天补全模型](/oss/javascript/langchain/models)。**
除非您明确在使用 `gpt-3.5-turbo-instruct`，否则您可能应该查看 [此页面](/oss/javascript/integrations/chat/openai/)。
[OpenAI](https://en.wikipedia.org/wiki/OpenAI) 是一个人工智能（AI）研究实验室。
本文将帮助您开始使用 LangChain 与 OpenAI 的补全模型（LLMs）。关于 OpenAI 功能和配置选项的详细文档，请参阅 [API 参考](https://reference.langchain.com/javascript/langchain-openai/OpenAI)。
## 概述
### 集成详情
| 类 | 包 | 本地 | 可序列化 | [Python 支持](https://python.langchain.com/docs/integrations/llms/openai) | 下载量 | 版本 |
| :----------------------------------------------------------------------------- | :--------------------------------------------------------------------- | :-: | :--: | :---------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------: |
| [`OpenAI`](https://reference.langchain.com/javascript/langchain-openai/OpenAI) | [`@langchain/openai`](https://www.npmjs.com/package/@langchain/openai) | ❌ | ✅ | ✅ |  |  |
## 设置
要访问 OpenAI 模型，您需要创建一个 OpenAI 账户，获取 API 密钥，并安装 `@langchain/openai` 集成包。
### 凭证
前往 [platform.openai.com](https://platform.openai.com/) 注册 OpenAI 并生成 API 密钥。完成后，设置 `OPENAI_API_KEY` 环境变量：
```bash theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
export OPENAI_API_KEY="your-api-key"
```
如果您希望自动追踪模型调用，还可以通过取消注释以下行来设置您的 [LangSmith](/langsmith/home) API 密钥：
```bash theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
# export LANGSMITH_TRACING="true"
# export LANGSMITH_API_KEY="your-api-key"
```
### 安装
LangChain OpenAI 集成位于 `@langchain/openai` 包中：
```bash npm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
npm install @langchain/openai @langchain/core
```
```bash yarn theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
yarn add @langchain/openai @langchain/core
```
```bash pnpm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
pnpm add @langchain/openai @langchain/core
```
## 实例化
现在我们可以实例化模型对象并生成补全结果：
```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { OpenAI } from "@langchain/openai"
const llm = new OpenAI({
model: "gpt-3.5-turbo-instruct",
temperature: 0,
maxTokens: undefined,
timeout: undefined,
maxRetries: 2,
apiKey: process.env.OPENAI_API_KEY,
// 其他参数...
})
```
## 调用
```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const inputText = "OpenAI is an AI company that "
const completion = await llm.invoke(inputText)
completion
```
```text theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
develops and promotes friendly AI for the benefit of humanity. It was founded in 2015 by Elon Musk, Sam Altman, Greg Brockman, Ilya Sutskever, Wojciech Zaremba, John Schulman, and Chris Olah. The company's mission is to create and promote artificial general intelligence (AGI) that is safe and beneficial to humanity.
OpenAI conducts research in various areas of AI, including deep learning, reinforcement learning, robotics, and natural language processing. The company also develops and releases open-source tools and platforms for AI research, such as the GPT-3 language model and the Gym toolkit for reinforcement learning.
One of the main goals of OpenAI is to ensure that the development of AI is aligned with human values and does not pose a threat to humanity. To this end, the company has established a set of principles for safe and ethical AI development, and it actively collaborates with other organizations and researchers in the field.
OpenAI has received funding from various sources, including tech giants like Microsoft and Amazon, as well as individual investors. It has also partnered with companies and organizations such as Google, IBM, and the United Nations to advance its research and promote responsible AI development.
In addition to its research and development
```
## 自定义 URL
您可以通过传递 `configuration` 参数来自定义 SDK 发送请求的基础 URL，如下所示：
```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const llmCustomURL = new OpenAI({
temperature: 0.9,
configuration: {
baseURL: "https://your_custom_url.com",
},
});
```
您还可以传递官方 SDK 接受的其他 `ClientOptions` 参数。
如果您在 Azure OpenAI 上托管，请参阅 [专用页面](/oss/javascript/integrations/llms/azure)。
***
## API 参考
关于所有 `OpenAI` 功能和配置的详细文档，请前往 [API 参考](https://reference.langchain.com/javascript/langchain-openai/OpenAI)。
***
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