> ## Documentation Index
> Fetch the complete documentation index at: https://agno-v2-service-account.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Reasoning With Model

> Use a separate reasoning model with configurable step limits.

```python reasoning_with_model.py theme={null}
"""
Reasoning With Model
=============================

Use a separate reasoning model with configurable step limits.
"""

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

# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------
agent = Agent(
    model=OpenAIResponses(id="gpt-5.2"),
    # Use a separate model for the reasoning/thinking step
    reasoning_model=OpenAIResponses(id="gpt-5-mini"),
    reasoning=True,
    reasoning_min_steps=2,
    reasoning_max_steps=5,
    markdown=True,
)

# ---------------------------------------------------------------------------
# Run Agent
# ---------------------------------------------------------------------------
if __name__ == "__main__":
    agent.print_response(
        "A farmer has 17 sheep. All but 9 die. How many sheep are left?",
        stream=True,
        show_full_reasoning=True,
    )
```

## Run the Example

<Steps>
  <Snippet file="create-venv-step.mdx" />

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U agno openai
    ```
  </Step>

  <Step title="Export your OpenAI API key">
    <CodeGroup>
      ```bash Mac/Linux theme={null}
      export OPENAI_API_KEY="your_openai_api_key_here"
      ```

      ```bash Windows theme={null}
      $Env:OPENAI_API_KEY="your_openai_api_key_here"
      ```
    </CodeGroup>
  </Step>

  <Step title="Run the example">
    Save the code above as `reasoning_with_model.py`, then run:

    ```bash theme={null}
    python reasoning_with_model.py
    ```
  </Step>
</Steps>

Full source: [cookbook/02\_agents/13\_reasoning/reasoning\_with\_model.py](https://github.com/agno-agi/agno/blob/main/cookbook/02_agents/13_reasoning/reasoning_with_model.py)