DeepSeek

DeepSeek 从源头提供 V4 Flash、V4 Pro 和一个实验性的 Flash Vision。OpenAI 兼容（也兼容 Anthropic），注册即送一笔余额，而不是长期的每日配额；之后按量付费。限额随负载浮动。

获取 API 密钥官方文档 ↗

1M 上下文，同一个 id 上可开关思考 —— 旧的 chat/reasoner 二分已取消。起步不要卡。想不经过路由直接用 DeepSeek，就走这扇门。文档在 api-docs.deepseek.com。

免费模型: 3
最大上下文: 1M
免费额度: 注册送赠款
注册要求: 只要邮箱，不要卡

端点

接口地址https://api.deepseek.com/v1

环境变量DEEPSEEK_API_KEY

速率限制Dynamic, based on load

OpenAI 兼容
文本
图像

代码示例

npm install openai

import OpenAI from 'openai'

const client = new OpenAI({
  baseURL: 'https://api.deepseek.com/v1',
  apiKey: process.env.DEEPSEEK_API_KEY
})

const response = await client.chat.completions.create({
  model: 'deepseek-v4-flash',
  messages: [{ role: 'user', content: 'Explain closures in one paragraph.' }]
})

console.log(response.choices[0].message.content)

pip install openai

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.deepseek.com/v1",
    api_key=os.environ["DEEPSEEK_API_KEY"],
)

response = client.chat.completions.create(
    model="deepseek-v4-flash",
    messages=[{"role": "user", "content": "Explain closures in one paragraph."}],
)

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

curl https://api.deepseek.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $DEEPSEEK_API_KEY" \
  -d '{
    "model": "deepseek-v4-flash",
    "messages": [{"role": "user", "content": "Explain closures in one paragraph."}]
  }'

你能免费使用的模型3

DeepSeek V4 Flashdeepseek-v4-flash
DeepSeek V4 Prodeepseek-v4-pro
DeepSeek V4 Flash Visiondeepseek-v4-flash-vision-exp