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Make sure to start the proxy server: 
litellm --model gpt-5-mini --host 127.0.0.1 --port 4000

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Code

cookbook/models/litellm_openai/tool_use.py
from agno.agent import Agent
from agno.models.litellm import LiteLLMOpenAI
from agno.tools.duckduckgo import DuckDuckGoTools

agent = Agent(
    model=LiteLLMOpenAI(id="gpt-5-mini"),
    tools=[DuckDuckGoTools()],
        markdown=True,
)
agent.print_response("Whats happening in France?")

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Usage

1

Create a virtual environment

Open the Terminal and create a python virtual environment.
python3 -m venv .venv
source .venv/bin/activate
2

Set your API key

export LITELLM_API_KEY=xxx
3

Install libraries

pip install -U litellm[proxy] openai agno ddgs
4

Start the proxy server

litellm --model gpt-5-mini --host 127.0.0.1 --port 4000
5

Run Agent

python cookbook/models/litellm_openai/tool_use.py