Base URL 怎么填？/v1、根域名、/v1beta 有什么区别？

import openai

client = openai.OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.apiyi.com/v1"  # 域名 + /v1
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "你好！"}]
)
print(response.choices[0].message.content)

import anthropic

client = anthropic.Anthropic(
    api_key="YOUR_API_KEY",
    base_url="https://api.apiyi.com"  # 只填根域名，不要加 /v1
)

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "你好！"}]
)
print(message.content[0].text)

from google import genai

client = genai.Client(
    api_key="YOUR_API_KEY",
    http_options={"api_version": "v1beta", "base_url": "https://api.apiyi.com"}
)

response = client.models.generate_content(
    model="gemini-2.5-pro",
    contents="你好！"
)
print(response.text)