Como devo configurar a Base URL?

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://www.bettertoken.ai/v1"
)

response = client.chat.completions.create(
    model="your-model-id",
    messages=[{"role": "user", "content": "hello"}]
)

import anthropic

client = anthropic.Anthropic(
    api_key="YOUR_API_KEY",
    base_url="https://www.bettertoken.ai"
)

message = client.messages.create(
    model="your-claude-model-id",
    max_tokens=1024,
    messages=[{"role": "user", "content": "hello"}]
)