Pydantic AI Has a Free API: Build Type-Safe AI Agents in Python

The team that built Pydantic (used by FastAPI, LangChain, and 90% of Python AI projects) built an agent framework. And it's exactly what you'd expect — type-safe, fast, and practical. What Is Pydantic AI? Pydantic AI is a Python agent framework from the creators of Pydantic. It brings the same philosophy — type safety, validation, developer experience — to AI agents. from pydantic_ai import Agent agent = Agent ( ' openai:gpt-4o ' , system_prompt = ' You are a helpful assistant that speaks concisely. ' ) result = agent . run_sync ( ' What is the capital of France? ' ) print ( result . data ) # "Paris" Structured Output from pydantic import BaseModel from pydantic_ai import Agent class CityInfo ( BaseModel ): name : str country : str population : int famous_for : list [ str ] agent = Agent ( ' openai:gpt-4o ' , result_type = CityInfo ) result = agent . run_sync ( ' Tell me about Tokyo ' ) city = result . data # CityInfo with full typing print ( f " { city . name } : pop { city . populati