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LangSmith Client SDKs

Release Notes Python Downloads

NPM Version JS Downloads

This repository contains the Python and Javascript SDK's for interacting with the LangSmith platform.

LangSmith helps your team debug, evaluate, and monitor your language models and intelligent agents. It works with any LLM Application, including a native integration with the LangChain Python and LangChain JS open source libraries.

LangSmith is developed and maintained by LangChain, the company behind the LangChain framework.

Quick Start

To get started with the Python SDK, install the package, then follow the instructions in the Python README.

pip install -U langsmith
export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=ls_...

Then start tracing your app:

import openai
from langsmith import traceable
from langsmith.wrappers import wrap_openai

client = wrap_openai(openai.Client())

client.chat.completions.create(
    messages=[{"role": "user", "content": "Hello, world"}],
    model="gpt-3.5-turbo"
)

To get started with the JavaScript / TypeScript SDK, install the package, then follow the instructions in the JS README.

yarn add langsmith
export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=ls_...

Then start tracing your app!

import { OpenAI } from "openai";
import { traceable } from "langsmith/traceable";
import { wrapOpenAI } from "langsmith/wrappers";

const client = wrapOpenAI(new OpenAI());

await client.chat.completions.create({
  model: "gpt-3.5-turbo",
  messages: [{ content: "Hi there!", role: "user" }],
});
{
  id: 'chatcmpl-8sOWEOYVyehDlyPcBiaDtTxWvr9v6',
  object: 'chat.completion',
  created: 1707974654,
  model: 'gpt-3.5-turbo-0613',
  choices: [
    {
      index: 0,
      message: { role: 'assistant', content: 'Hello! How can I help you today?' },
      logprobs: null,
      finish_reason: 'stop'
    }
  ],
  usage: { prompt_tokens: 10, completion_tokens: 9, total_tokens: 19 },
  system_fingerprint: null
}

Cookbook

For tutorials on how to get more value out of LangSmith, check out the Langsmith Cookbook repo.

Documentation

To learn more about the LangSmith platform, check out the docs

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  • Python 62.3%
  • TypeScript 36.8%
  • Other 0.9%