Toggle Thinking Mode

Control DeepSeek's reasoning with the use_thinking flag.

Code

V4 models run with thinking enabled by default, so you get reasoning_content out of the box. Use the use_thinking flag to control it.

from agno.agent import Agent
from agno.models.deepseek import DeepSeek

# Thinking enabled (default) - returns reasoning_content
thinking_agent = Agent(model=DeepSeek(id="deepseek-v4-flash"), markdown=True)

# Thinking disabled - faster, no reasoning_content
non_thinking_agent = Agent(
    model=DeepSeek(id="deepseek-v4-flash", use_thinking=False),
    markdown=True,
)

if __name__ == "__main__":
    thinking_agent.print_response("Why is the sky blue?", stream=True)

    non_thinking_agent.print_response("Why is the sky blue?", stream=True)

Usage

Set up your virtual environment

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

Set your API key

export DEEPSEEK_API_KEY=xxx

Install dependencies

uv pip install -U openai agno

Run Agent

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

python thinking_mode.py