Non-Reasoning Model Agent

Use ReasoningTools with GPT-4.1 during the normal tool loop.

Use explicit tools to add planning notes to a model without native reasoning.

GPT-4.1 is not a supported separate reasoning_model. Use ReasoningTools as below, or configure a supported native model for a separate reasoning stage.

Add the following code to your Python file

non-reasoning-model-cot.py
from agno.agent import Agent
from agno.models.openai import OpenAIChat
from agno.tools.reasoning import ReasoningTools

agent = Agent(
    model=OpenAIChat(id="gpt-4.1"),
    tools=[ReasoningTools(add_instructions=True)],
    markdown=True,
)
agent.print_response(
    "Plan a Python function for the Fibonacci sequence and check its base cases.",
    stream=True,
    show_full_reasoning=True,
)

Set up your virtual environment

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

Install dependencies

uv pip install -U openai agno

Export your OpenAI API key

  export OPENAI_API_KEY="your_openai_api_key_here"

Run Agent

python non-reasoning-model-cot.py