Langfuse

export LANGFUSE_SECRET_KEY="sk-lf-..."
export LANGFUSE_PUBLIC_KEY="pk-lf-..."
export LANGFUSE_BASE_URL="https://cloud.langfuse.com"
export TOKENLAB_API_KEY="sk-your-tokenlab-key"

import os

from langfuse import observe
from langfuse.openai import openai

openai.api_key = os.environ["TOKENLAB_API_KEY"]
openai.base_url = "https://api.tokenlab.sh/v1"


@observe()
def story():
    return openai.chat.completions.create(
        model="claude-sonnet-5",
        messages=[{"role": "user", "content": "Write a short haiku."}],
    ).choices[0].message.content