Haystack

export TOKENLAB_API_KEY="sk-your-tokenlab-key"

from haystack.components.generators.chat import OpenAIChatGenerator
from haystack.dataclasses import ChatMessage
from haystack.utils import Secret

generator = OpenAIChatGenerator(
    api_key=Secret.from_env_var("TOKENLAB_API_KEY"),
    api_base_url="https://api.tokenlab.sh/v1",
    model="claude-sonnet-5",
)

response = generator.run(
    messages=[ChatMessage.from_user("Summarize this document in one sentence.")]
)