ai-agents-basic-agent-you-need-to-quickly-create-a-minimal-agent-with-st-f648f6af

THEN Instantiate the Agent class with the model name and instructions as keyword arguments, then call agent.run_sync(user_prompt) to get a synchronous text response.

from pydantic_ai import Agent
agent = Agent('anthropic:claude-sonnet-4-6', instructions='Be concise, reply with one sentence.')
result = agent.run_sync('Where does "hello world" come from?')
print(result.output)