DeepSeek Thinking Mode

DeepSeek V4 models run with thinking mode enabled by default, so you get reasoning_content out of the box.

DeepSeek V4 models run with thinking mode enabled by default, so you get reasoning_content out of the box. Use the use_thinking flag to control it: use_thinking=True forces it on, use_thinking=False turns it off for a faster, cheaper response.

thinking_mode.py

"""
Deepseek Thinking Mode
======================

DeepSeek V4 models run with thinking mode enabled by default, so you get
reasoning_content out of the box. Use the `use_thinking` flag to control it:
`use_thinking=True` forces it on, `use_thinking=False` turns it off for a faster,
cheaper response.
"""

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,
)

# ---------------------------------------------------------------------------
# Run Agents
# ---------------------------------------------------------------------------
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)

Run the Example

1. Set up your virtual environment

   Mac

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

   uv venv --python 3.12
   .venv\Scripts\activate
   
2. Install dependencies

   uv pip install -U agno openai
   
3. Export your DeepSeek API key

   Mac/Linux

   export DEEPSEEK_API_KEY="your_deepseek_api_key_here"
   

   $Env:DEEPSEEK_API_KEY="your_deepseek_api_key_here"
   
4. Run the example

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

   python thinking_mode.py
   

Full source: cookbook/90_models/deepseek/thinking_mode.py