Basic Reasoning Agent

Equip agents with chain-of-thought reasoning capabilities.

Example showing how to configure a basic Reasoning Agent, using the reasoning=True flag.

1. Add the following code to your Python file

   basic_cot.py

   from agno.agent import Agent
   from agno.models.openai import OpenAIResponses
   
   task = (
       "Analyze the key factors that led to the signing of the Treaty of Versailles in 1919. "
       "Discuss the political, economic, and social impacts of the treaty on Germany and how it "
       "contributed to the onset of World War II. Provide a nuanced assessment that includes "
       "multiple historical perspectives."
   )
   
   reasoning_agent = Agent(
       model=OpenAIResponses(id="gpt-5.2"),
       reasoning=True, # The Agent will be able to reason.
       markdown=True,
   )
   reasoning_agent.print_response(task, stream=True, show_full_reasoning=True)
   
2. Set up your virtual environment

   Mac

   uv venv --python 3.12
   source .venv/bin/activate
   

   uv venv --python 3.12
   .venv\Scripts\activate
   
3. Install dependencies

   uv pip install -U openai agno
   
4. Export your OpenAI API key

   Mac/Linux

     export OPENAI_API_KEY="your_openai_api_key_here"
   

     $Env:OPENAI_API_KEY="your_openai_api_key_here"
   
5. Run Agent

   python basic_cot.py