OpenAI SDK

The OpenAI wrapper is the simplest way to integrate Galileo logging into your application. By using Galileo’s OpenAI wrapper instead of importing the OpenAI library directly, you can automatically log all prompts, responses, and statistics without any additional code changes in an LLM span for every call.

The Python SDK supports both the Chat Completions API and the Responses API. The TypeScript SDK currently only supports the Chat Completions API.

The wrapper supports both the OpenAI and Azure OpenAI APIs, so will work out of the box with Azure deployments, as well as any LLM that supports the OpenAI SDK.

Python Galileo OpenAI SDK reference

The Python Galileo OpenAI SDK reference.

TypeScript Galileo OpenAI SDK reference

The TypeScript Galileo OpenAI SDK reference.

Installation

First, make sure you have the Galileo SDK installed. If you are using Python, ensure you install the OpenAI optional dependency.

pip install "galileo[openai]"

uv pip install "galileo[openai]"

poetry add "galileo[openai]"

npm install galileo

yarn add galileo

pnpm add galileo

Basic usage

If you are using Python, import the galileo.openai module, instead of the OpenAI openai module and use that to create your client. If you are using TypeScript, use the wrapper to wrap your OpenAI client.

import os
from galileo.openai import openai

# Initialize the Galileo wrapped OpenAI client
client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

# Use the Galileo wrapped OpenAI client which logs automatically
# This will create a single span trace with the OpenAI call
chat_completion = client.chat.completions.create(
    messages=[{"role": "user", "content": "Say this is a test"}],
    model="gpt-4o"
)

print(chat_completion.choices[0].message.content)

import { OpenAI } from "openai";
import { wrapOpenAI, flush } from "galileo";

// Wrap the OpenAI client
const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

// Use the Galileo wrapped OpenAI client which logs automatically
// This will create a single span trace with the OpenAI call
const response = await openai.chat.completions.create({
    model: "gpt-4.1-mini",
    messages: [{ content: "Say hello world!", role: "user" }],
});

// Flush logs before exiting
await flush();

console.log(response);

This example will automatically produce a single-span trace in your Log stream. The wrapper handles all the logging for you, capturing:

The input prompt
The model used
The response
Timing information
Token usage
Other relevant metadata

Responses API (Python only)

The Python SDK also supports OpenAI’s Responses API, which provides a simplified interface for single-turn interactions and additional features like built-in tools.

Responses API basic example

Python

from galileo.openai import openai

client = openai.OpenAI()

response = client.responses.create(
    model="gpt-4o",
    input="What is the capital of France?"
)

print(response.output_text)

Tool calls

The Responses API supports function calling. Here’s an example that demonstrates tool definitions, executing tool calls, and providing results back to the model:

Python

import json
from galileo.openai import openai

client = openai.OpenAI()

# Define tools
tools = [
    {
        "type": "function",
        "name": "get_weather",
        "description": "Get the current weather for a given location",
        "parameters": {
            "type": "object",
            "properties": {
                "location": {
                    "type": "string",
                    "description": "The city and state, e.g. San Francisco, CA",
                },
            },
            "required": ["location"],
        },
    },
    {
        "type": "function",
        "name": "get_stock_price",
        "description": "Get the current stock price for a given ticker symbol",
        "parameters": {
            "type": "object",
            "properties": {
                "symbol": {
                    "type": "string",
                    "description": "The stock ticker symbol, e.g. AAPL",
                },
            },
            "required": ["symbol"],
        },
    },
]

def get_weather(location: str) -> str:
    return json.dumps({"location": location, "temperature": 72, "unit": "fahrenheit"})

def get_stock_price(symbol: str) -> str:
    return json.dumps({"symbol": symbol.upper(), "price": 178.50, "currency": "USD"})

# First call - model decides which tools to use
user_message = "What's the weather in San Francisco and the stock price of Apple?"

response = client.responses.create(
    model="gpt-4o",
    input=user_message,
    tools=tools,
)

# Process tool calls and collect results
input_list = list(response.output)

for item in response.output:
    if item.type == "function_call":
        if item.name == "get_weather":
            result = get_weather(**json.loads(item.arguments))
        elif item.name == "get_stock_price":
            result = get_stock_price(**json.loads(item.arguments))
        else:
            continue

        input_list.append({
            "type": "function_call_output",
            "call_id": item.call_id,
            "output": result,
        })

# Second call - model generates final response with tool results
response = client.responses.create(
    model="gpt-4o",
    input=input_list,
    tools=tools,
)

print(response.output_text)

The Responses API also supports advanced features like:

Reasoning items with the reasoning parameter for chain-of-thought outputs
Built-in tools including web search, code interpreter, and file search
Streaming with stream=True

See the OpenAI Responses API documentation for more details.

Sessions and traces

If you use the OpenAI wrapper by itself, it will automatically create a session and start a new trace for you, adding the call as an LLM span. Subsequent calls will be added as an LLM span to a new trace in the same session. The session will have an autogenerated name based off the content.

import os
from galileo.openai import openai

# Initialize the Galileo wrapped OpenAI client
client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

# Use the Galileo wrapped OpenAI client which logs automatically
# This will create a single span trace with the OpenAI call in a new session
first_result = client.chat.completions.create(
    messages=[{"role": "user", "content": "Tell me about the Roman Empire"}],
    model="gpt-4o"
)

# This second call will create a new single span trace inside the same session
second_result = client.chat.completions.create(
    messages=[{
        "role": "user",
        "content": f"Summarize this: {first_result.choices[0].message.content}"
    }],
    model="gpt-4o"
)

print(second_result.choices[0].message.content)

import { OpenAI } from "openai";
import { wrapOpenAI, flush } from "galileo";

// Wrap the OpenAI client
const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

// Use the Galileo wrapped OpenAI client which logs automatically
// This will create a single span trace with the OpenAI call in a new session
const firstResult = await openai.chat.completions.create({
    messages: [{"role": "user", "content": "Tell me about the Roman Empire"}],
    model: "gpt-4.1-mini"
});

// This second call will create a new single span trace inside the same session
const secondResult = await openai.chat.completions.create({
    messages: [{
        "role": "user",
        "content": `Summarize this: ${firstResult.choices[0].message.content}`
    }],
    model: "gpt-4.1-mini"
});

console.log(secondResult.choices[0].message.content);

// Flush logs before exiting
await flush();

A single session with 2 traces in the Galileo Console

If you manually start a session before using the OpenAI wrapper, all calls to the wrapper will be added as new traces to that session.

import os
from galileo.openai import openai
from galileo import galileo_context

# Get the logger instance
logger = galileo_context.get_logger_instance()

# Start a session
logger.start_session("Chat about the Roman Empire")

# Initialize the Galileo wrapped OpenAI client
client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

# Use the Galileo wrapped OpenAI client which logs automatically
# This will create a single span trace in the current session
first_result = client.chat.completions.create(
    messages=[{"role": "user", "content": "Tell me about the Roman Empire"}],
    model="gpt-4o"
)

# This second call will create a new single span trace inside the same session
second_result = client.chat.completions.create(
    messages=[{
        "role": "user",
        "content": f"Summarize this: {first_result.choices[0].message.content}"
    }],
    model="gpt-4o"
)

print(second_result.choices[0].message.content)

import { OpenAI } from "openai";
import { wrapOpenAI, flush, getLogger } from "galileo";

// Get the logger instance
const logger = getLogger();

// Start a session
logger.startSession({
    name: "Chat about the Roman Empire",
});

// Wrap the OpenAI client
const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

// Use the Galileo wrapped OpenAI client which logs automatically
// This will create a single span trace in the current session
const firstResult = await openai.chat.completions.create({
    messages: [{"role": "user", "content": "Tell me about the Roman Empire"}],
    model: "gpt-4.1-mini"
});

// This second call will create a new single span trace inside the same session
const secondResult = await openai.chat.completions.create({
    messages: [{
        "role": "user",
        "content": `Summarize this: ${firstResult.choices[0].message.content}`
    }],
    model: "gpt-4.1-mini"
});

console.log(secondResult.choices[0].message.content);

// Flush logs before exiting
await flush();

A single session called Chat about the Roman Empire with 2 traces in the Galileo Console

If you create a new trace before using the OpenAI wrapper, all calls will be added as LLM spans to that trace.

import os
from galileo.openai import openai
from galileo import galileo_context

# Get the logger instance
logger = galileo_context.get_logger_instance()

# Start a session
logger.start_session("Chat about the Roman Empire")

# Start a new trace
logger.start_trace("Summary of the Roman Empire")

# Initialize the Galileo wrapped OpenAI client
client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

# Use the Galileo wrapped OpenAI client which logs automatically
# This will create a single span trace in the current session
first_result = client.chat.completions.create(
    messages=[{"role": "user", "content": "Tell me about the Roman Empire"}],
    model="gpt-4o"
)

# This second call will create a new single span trace inside the same session
second_result = client.chat.completions.create(
    messages=[{
        "role": "user",
        "content": f"Summarize this: {first_result.choices[0].message.content}"
    }],
    model="gpt-4o"
)

print(second_result.choices[0].message.content)

import { OpenAI } from "openai";
import { wrapOpenAI, flush, getLogger } from "galileo";

// Get the logger instance
const logger = getLogger();

// Start a session
logger.startSession({
    name: "Chat about the Roman Empire",
});

// Start a new trace
const trace = logger.startTrace({
    input: "Summary of the Roman Empire"
});

// Wrap the OpenAI client
const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

// Use the Galileo wrapped OpenAI client which logs automatically
// This will create a single span trace in the current session
const firstResult = await openai.chat.completions.create({
    messages: [{"role": "user", "content": "Tell me about the Roman Empire"}],
    model: "gpt-4.1-mini"
});

// This second call will create a new single span trace inside the same session
const secondResult = await openai.chat.completions.create({
    messages: [{
        "role": "user",
        "content": `Summarize this: ${firstResult.choices[0].message.content}`
    }],
    model: "gpt-4.1-mini"
});

console.log(secondResult.choices[0].message.content);

// Flush logs before exiting
await flush();

A single session called Chat about the Roman Empire with 1 trace in the Galileo Console

Streaming support

The OpenAI wrapper also supports streaming responses. When streaming, the wrapper will log the response as it streams in:

import os
from galileo.openai import openai

client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

stream = client.chat.completions.create(
    messages=[{"role": "user", "content": "Say this is a streaming test"}],
    model="gpt-4o",
    stream=True,
)

# This will create a single span trace with the OpenAI call
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")

import { OpenAI } from "openai";
import { wrapOpenAI, flush } from "galileo";

const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

const stream = await openai.chat.completions.create({
    messages: [{"role": "user", "content": "Say this is a streaming test"}],
    model: "gpt-4.1-mini",
    stream: true
});

for await (const part of stream) {
    console.log(part.choices[0]?.delta?.content || '');
}

// Flush logs before exiting
await flush();

Combining with the log decorator

You can combine the OpenAI wrapper with the log decorator to create more complex traces:

import os
from galileo import log
from galileo.openai import openai

client = openai.OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))

def call_openai(prompt):
    # This will be automatically logged as a child span
    chat_completion = client.chat.completions.create(
        messages=[{"role": "user", "content": prompt}],
        model="gpt-4o"
    )
    return chat_completion.choices[0].message.content

@log(span_type="workflow", name="Roman Empire Span")
def make_nested_call():
    # This creates a parent workflow span
    first_result = call_openai("Tell me about the Roman Empire")
    second_result = call_openai(f"Summarize this: {first_result}")
    return second_result

# This will create a trace with a workflow span and two nested LLM spans
response = make_nested_call()
print(response)

import { log, flush, wrapOpenAI } from "galileo";
import { OpenAI } from "openai";

// Create a wrapped OpenAI client
const openai = wrapOpenAI(new OpenAI({ apiKey: process.env.OPENAI_API_KEY }));

async function callOpenAI(prompt: string) {
    // This will be automatically logged as a child span
    const response = await openai.chat.completions.create({
        model: "gpt-4.1-mini",
        messages: [{ role: "user", content: prompt }],
    });
    return response.choices[0].message.content;
}

const makeNestedCall = log({ spanType: "workflow", name: "Roman Empire Span" },
                             async () => {
    // This creates a parent workflow span
    const firstResult = await callOpenAI("Tell me about the Roman Empire")
    const secondResult = await callOpenAI(`Summarize this: ${firstResult}`)
    return secondResult
});

const response = await makeNestedCall();
await flush();

console.log(response);

Benefits of using the OpenAI integration

Zero-config logging: No need to add logging code throughout your application
Complete visibility: All prompts and responses are automatically captured
Minimal code changes: Change your import statement in Python, or create a wrapper in TypeScript. No other code changes are required.
Automatic tracing: Creates spans and traces without manual setup
Streaming support: Works with both regular and streaming responses

Asynchronous OpenAI calls with Galileo

The Galileo OpenAI wrapper currently supports only synchronous calls for both the Chat Completions API and the Responses API. It does not include built-in support for the AsyncOpenAI class from the official OpenAI Python library. As a result, asynchronous calls made via the galileo.openai wrapper won’t automatically generate LLM spans or upload telemetry to Galileo.You can still track async interactions by manually using the low-level GalileoLogger API. This requires importing and awaiting the OpenAI AsyncOpenAI client, wrapping each call with a call to add an LLM span, and flushing the logger to send your traces.

Next steps

Galileo logger

Log with full control over sessions, traces, and spans using the Galileo logger.

Log decorator

Quickly add logging to your code with the log decorator and wrapper.

Galileo context

Manage logging using the Galileo context manager.

Overview

Get Started

Observability

Evaluation Metrics

Signals

AI Assistant

Luna Studio

Experiments

Agent Control

Annotations

Integrations

Security

References

Python Galileo OpenAI SDK reference

TypeScript Galileo OpenAI SDK reference

Installation

Basic usage

Responses API (Python only)

Responses API basic example

Tool calls

Sessions and traces

Streaming support

Combining with the log decorator

Benefits of using the OpenAI integration

Asynchronous OpenAI calls with Galileo

Next steps

Galileo logger

Log decorator

Galileo context

Python Galileo OpenAI SDK reference

TypeScript Galileo OpenAI SDK reference

​Installation

​Basic usage

​Responses API (Python only)

​Responses API basic example

​Tool calls

​Sessions and traces

​Streaming support

​Combining with the log decorator

​Benefits of using the OpenAI integration

​Asynchronous OpenAI calls with Galileo

​Next steps

Galileo logger

Log decorator

Galileo context

Installation

Basic usage

Responses API (Python only)

Responses API basic example

Tool calls

Sessions and traces

Streaming support

Combining with the log decorator

Benefits of using the OpenAI integration

Asynchronous OpenAI calls with Galileo

Next steps