hello_world_gpt_5.py

import asyncio

from openai.types.shared import Reasoning

from agents import Agent, ModelSettings, Runner

# If you have a certain reason to use Chat Completions, you can configure the model this way,
# and then you can pass the chat_completions_model to the Agent constructor.
# from openai import AsyncOpenAI
# client = AsyncOpenAI()
# from agents import OpenAIChatCompletionsModel
# chat_completions_model = OpenAIChatCompletionsModel(model="gpt-5.5", openai_client=client)


async def main():
    agent = Agent(
        name="Knowledgable GPT-5 Assistant",
        instructions="You're a knowledgable assistant. You always provide an interesting answer.",
        model="gpt-5.5",
        model_settings=ModelSettings(
            reasoning=Reasoning(effort="low"),  # "none", "low", "medium", "high", "xhigh"
            verbosity="low",  # "low", "medium", "high"
        ),
    )
    result = await Runner.run(agent, "Tell me something about recursion in programming.")
    print(result.final_output)


if __name__ == "__main__":
    asyncio.run(main())