basic_reasoning_stream.py
"""
Basic Reasoning Stream
======================
Demonstrates this reasoning cookbook example.
"""
from agno.agent import Agent
from agno.models.anthropic import Claude
from agno.run.agent import RunEvent # noqa
# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------
def run_example() -> None:
# Create an agent with reasoning enabled
agent = Agent(
reasoning_model=Claude(
id="claude-sonnet-4-5",
thinking={"type": "enabled", "budget_tokens": 1024},
),
reasoning=True,
instructions="Think step by step about the problem.",
)
prompt = "What is 25 * 37? Show your reasoning."
agent.print_response(prompt, stream=True, stream_events=True)
# # or you can capture the event using
# for run_output_event in agent.run(
# prompt,
# stream=True,
# stream_events=True,
# ):
# if run_output_event.event == RunEvent.run_started:
# print(f"\nEVENT: {run_output_event.event}")
# elif run_output_event.event == RunEvent.reasoning_started:
# print(f"\nEVENT: {run_output_event.event}")
# print("Reasoning started...\n")
# elif run_output_event.event == RunEvent.reasoning_content_delta:
# # This is the NEW streaming event for reasoning content
# # It streams the raw content as it's being generated
# print(run_output_event.reasoning_content, end="", flush=True)
# elif run_output_event.event == RunEvent.run_content:
# if run_output_event.content:
# print(run_output_event.content, end="", flush=True)
# elif run_output_event.event == RunEvent.run_completed:
# print(f"\n\nEVENT: {run_output_event.event}")
# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
if __name__ == "__main__":
run_example()
Run the Example
1
Set up your virtual environment
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 anthropic openai
3
Export your API keys
export ANTHROPIC_API_KEY="your_anthropic_api_key_here"
export OPENAI_API_KEY="your_openai_api_key_here"
$Env:ANTHROPIC_API_KEY="your_anthropic_api_key_here"
$Env:OPENAI_API_KEY="your_openai_api_key_here"
4
Run the example
Save the code above as
basic_reasoning_stream.py, then run:python basic_reasoning_stream.py