首次调用 API

DeepSeek API 使用与 OpenAI/Anthropic 兼容的 API 格式，通过修改配置，您可以使用 OpenAI/Anthropic SDK 来访问 DeepSeek API，或使用与 OpenAI/Anthropic API 兼容的软件。

PARAM	VALUE
base_url (OpenAI)	https://api.deepseek.com
base_url (Anthropic)	https://api.deepseek.com/anthropic
api_key	apply for an API key
model*	deepseek-v4-flash deepseek-v4-pro deepseek-chat (将于 2026/07/24 弃用) deepseek-reasoner (将于 2026/07/24 弃用)

* deepseek-chat 与 deepseek-reasoner 两个模型名将于 2026/07/24 弃用。出于兼容考虑，二者分别对应 deepseek-v4-flash 的非思考与思考模式。

接入 Agent 工具

DeepSeek API 已接入多种主流 AI Agent 与编程助手工具。如果你使用 Claude Code、GitHub Copilot、OpenCode 等工具，可以直接将 DeepSeek 作为后端模型，无需编写代码即可开始使用。

详见 Agent 工具接入指南。

调用对话 API

在创建 API key 之后，你可以使用以下样例脚本，通过 OpenAI API 格式来访问 DeepSeek 模型。样例为非流式输出，您可以将 stream 设置为 true 来使用流式输出。

Anthropic API 格式的访问样例，请参考Anthropic API。

curl

curl https://api.deepseek.com/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer ${DEEPSEEK_API_KEY}" \
  -d '{
        "model": "deepseek-v4-pro",
        "messages": [
          {"role": "system", "content": "You are a helpful assistant."},
          {"role": "user", "content": "Hello!"}
        ],
        "thinking": {"type": "enabled"},
        "reasoning_effort": "high",
        "stream": false
      }'

python

# Please install OpenAI SDK first: `pip3 install openai`
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ.get('DEEPSEEK_API_KEY'),
    base_url="https://api.deepseek.com")

response = client.chat.completions.create(
    model="deepseek-v4-pro",
    messages=[
        {"role": "system", "content": "You are a helpful assistant"},
        {"role": "user", "content": "Hello"},
    ],
    stream=False,
    reasoning_effort="high",
    extra_body={"thinking": {"type": "enabled"}}
)

print(response.choices[0].message.content)

nodejs

// Please install OpenAI SDK first: `npm install openai`

import OpenAI from "openai";

const openai = new OpenAI({
        baseURL: 'https://api.deepseek.com',
        apiKey: process.env.DEEPSEEK_API_KEY,
});

async function main() {
  const completion = await openai.chat.completions.create({
    messages: [{ role: "system", content: "You are a helpful assistant." }],
    model: "deepseek-v4-pro",
    thinking: {"type": "enabled"},
    reasoning_effort: "high",
    stream: false,
  });

  console.log(completion.choices[0].message.content);
}

main();