O3 Mini

Stream o3-mini working through the trolley problem with an ASCII diagram.

o3_mini.py
"""
O3 Mini
=======

Demonstrates this reasoning cookbook example.
"""

from agno.agent import Agent
from agno.models.openai import OpenAIChat


# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------
def run_example() -> None:
    agent = Agent(
        model=OpenAIChat(id="o3-mini"),
    )
    agent.print_response(
        "Solve the trolley problem. Evaluate multiple ethical frameworks. "
        "Include an ASCII diagram of your solution.",
        stream=True,
    )


# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
if __name__ == "__main__":
    run_example()

OpenAI schedules o3-mini and o4-mini for shutdown on October 23, 2026. The provider lifecycle notice lists their replacements. Check the selected replacement's reasoning and service-tier support before changing the source model ID.

Run the Example

Set up your virtual environment

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

Install dependencies

uv pip install -U agno openai

Export your OpenAI API key

export OPENAI_API_KEY="your_openai_api_key_here"

Run the example

Save the code above as o3_mini.py, then run:

python o3_mini.py

Full source: cookbook/10_reasoning/models/openai/o3_mini.py