OpenAI Reasoning Model GPT 4 1

Adapt the archived GPT-4.1 stage to a supported separate OpenAI reasoning model.

reasoning_model_gpt_4_1.py
"""
Reasoning Model Gpt 4 1
=======================

Demonstrates this reasoning cookbook example.
"""

from agno.agent import Agent
from agno.models.openai.responses import OpenAIResponses


# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------
def run_example() -> None:
    agent = Agent(
        model=OpenAIResponses(id="gpt-5.6-luna"),
        reasoning_model=OpenAIResponses(id="gpt-4.1"),
    )
    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()

Use a supported reasoning model

The archived OpenAIResponses(id="gpt-4.1") is not recognized as a native reasoning model, so Agno skips that stage and can still return the main model's answer. Before running, replace only the reasoning_model value with:

OpenAIResponses(id="gpt-5.2")

Keep the final model and prompt unchanged.

An explicit reasoning_model runs as a separate, tool-free reasoning stage before the main model response. show_full_reasoning=True displays the reasoning data Agno receives; it cannot reveal a provider's private internal trace. Some adapters use the reasoning stage's answer text when separate reasoning content is unavailable. A failed reasoning stage can still be followed by a main-model answer, so a completed run alone does not prove the reasoning stage succeeded.

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 reasoning_model_gpt_4_1.py, then run:

python reasoning_model_gpt_4_1.py

Full source: cookbook/10_reasoning/models/openai/reasoning_model_gpt_4_1.py