> ## Documentation Index
> Fetch the complete documentation index at: https://nvd-54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# OpenAI 集成
> 使用 LangChain JavaScript 集成 OpenAI LLM。
**You are currently on a page documenting the use of OpenAI text completion models. The latest and most popular OpenAI models are [chat completion models](/oss/javascript/langchain/models).**
Unless you are specifically using `gpt-3.5-turbo-instruct`, you are probably looking for [this page instead](/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。
This will help you get started with OpenAI completion models (LLMs) using LangChain. For detailed documentation on OpenAI features and configuration options, please refer to the [API reference](https://reference.langchain.com/javascript/langchain-openai/OpenAI).
## 概述
### 集成详情
| Class | Package | Local | Serializable | [PY support](https://python.langchain.com/docs/integrations/llms/openai) | Downloads | Version |
| :----------------------------------------------------------------------------- | :--------------------------------------------------------------------- | :---: | :----------: | :----------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------: |
| [`OpenAI`](https://reference.langchain.com/javascript/langchain-openai/OpenAI) | [`@langchain/openai`](https://www.npmjs.com/package/@langchain/openai) | ❌ | ✅ | ✅ |  |  |
## 设置
要访问 OpenAI models，你需要create an OpenAI account, get an API key, and install the `@langchain/openai` integration package.
### 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"
```
如果你想要自动追踪模型调用，还可以设置你的 [LangSmith](/langsmith/home) API 密钥，取消注释以下内容：
```bash theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
# export LANGSMITH_TRACING="true"
# export LANGSMITH_API_KEY="your-api-key"
```
### 安装
LangChain 的 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聊天补全：
```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
You can customize the base URL the SDK sends requests to by passing a `configuration` parameter like this:
```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const llmCustomURL = new OpenAI({
temperature: 0.9,
configuration: {
baseURL: "https://your_custom_url.com",
},
});
```
You can also pass other `ClientOptions` parameters accepted by the official SDK.
If you are hosting on Azure OpenAI, see the [dedicated page instead](/oss/javascript/integrations/llms/azure).
***
## API 参考
有关所有 `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)。
***
[将这些文档连接到](/use-these-docs) Claude、VSCode 等工具，通过 MCP 获取实时答案。
[在 GitHub 上编辑此页面](https://github.com/langchain-ai/docs/edit/main/src/oss/javascript/integrations/llms/openai.mdx) 或 [提交 issue](https://github.com/langchain-ai/docs/issues/new/choose)。