Instrument LLM calls made using the Google Gen AI Python SDK
pip install openinference-instrumentation-google-genai google-genaiSet the GEMINI_API_KEY environment variable. To use the Gen AI SDK with Vertex AI instead of the Developer API, refer to Google's guide on setting the required environment variables.
export GEMINI_API_KEY=[your_key_here]Use the register function to connect your application to Phoenix.
from phoenix.otel import register
# Configure the Phoenix tracer
tracer_provider = register(
project_name="my-llm-app", # Default is 'default'
auto_instrument=True # Auto-instrument your app based on installed OI dependencies
)Now that you have tracing setup, all Gen AI SDK requests will be streamed to Phoenix for observability and evaluation.
import os
from google import genai
def send_message_multi_turn() -> tuple[str, str]:
client = genai.Client(api_key=os.environ["GEMINI_API_KEY"])
chat = client.chats.create(model="gemini-2.0-flash-001")
response1 = chat.send_message("What is the capital of France?")
response2 = chat.send_message("Why is the sky blue?")
return response1.text or "", response2.text or ""Sign up for Phoenix:
Sign up for an Arize Phoenix account at https://app.phoenix.arize.com/login
Click Create Space, then follow the prompts to create and launch your space.
Install packages:
pip install arize-phoenix-otelSet your Phoenix endpoint and API Key:
From your new Phoenix Space
Create your API key from the Settings page
Copy your Hostname from the Settings page
In your code, set your endpoint and API key:
import os
os.environ["PHOENIX_API_KEY"] = "ADD YOUR PHOENIX API KEY"
os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = "ADD YOUR PHOENIX HOSTNAME"
# If you created your Phoenix Cloud instance before June 24th, 2025,
# you also need to set the API key as a header:
# os.environ["PHOENIX_CLIENT_HEADERS"] = f"api_key={os.getenv('PHOENIX_API_KEY')}"Launch your local Phoenix instance:
pip install arize-phoenix
phoenix serveFor details on customizing a local terminal deployment, see Terminal Setup.
Install packages:
pip install arize-phoenix-otelSet your Phoenix endpoint:
import os
os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = "http://localhost:6006"See Terminal for more details.
Pull latest Phoenix image from Docker Hub:
docker pull arizephoenix/phoenix:latestRun your containerized instance:
docker run -p 6006:6006 arizephoenix/phoenix:latestThis will expose the Phoenix on localhost:6006
Install packages:
pip install arize-phoenix-otelSet your Phoenix endpoint:
import os
os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = "http://localhost:6006"For more info on using Phoenix with Docker, see Docker.
Install packages:
pip install arize-phoenixLaunch Phoenix:
import phoenix as px
px.launch_app()