[](https://hamel.dev/blog/posts/prompt/#cb15-1)import instructor
[](https://hamel.dev/blog/posts/prompt/#cb15-2)from openai import OpenAI
[](https://hamel.dev/blog/posts/prompt/#cb15-3)from pydantic import BaseModel
[](https://hamel.dev/blog/posts/prompt/#cb15-4)
[](https://hamel.dev/blog/posts/prompt/#cb15-5)client = instructor.patch(OpenAI())
[](https://hamel.dev/blog/posts/prompt/#cb15-6)
[](https://hamel.dev/blog/posts/prompt/#cb15-7)class UserDetail(BaseModel):
[](https://hamel.dev/blog/posts/prompt/#cb15-8)    name: str
[](https://hamel.dev/blog/posts/prompt/#cb15-9)    age: int
[](https://hamel.dev/blog/posts/prompt/#cb15-10)
[](https://hamel.dev/blog/posts/prompt/#cb15-11)user = client.chat.completions.create(
[](https://hamel.dev/blog/posts/prompt/#cb15-12)    model="gpt-3.5-turbo",
[](https://hamel.dev/blog/posts/prompt/#cb15-13)    response_model=UserDetail,
[](https://hamel.dev/blog/posts/prompt/#cb15-14)    messages=[{"role": "user", "content": "Extract Jason is 25 years old"}])