LangChain Changelog

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February 2025

LangMem SDK for long-term agent memory

The LangMem SDK is a lightweight Python library that helps your agents learn and improve through long-term memory. It provides tooling to extract information...

February 20, 2025

LangSmith LangGraph

LangSmith dataset integration in LangGraph Studio

You can now send node inputs/outputs from LangGraph Studio directly to LangSmith datasets for testing! This means you can open LLM runs from LangGraph Studio...

February 8, 2025

📊 New LangSmith experiment view for result analysis

The new LangSmith experiment view is now live, which makes it easier to explore your results. Use the experiment view to analyze the results and draw...

February 4, 2025

January 2025

Waterfall graphs to spot latency bottlenecks in LangSmith

You can now visualize traces as a waterfall graph for deeper insights into your app’s latency in LangSmith. Use the waterfall graph to: Try it out today:...

January 30, 2025

Functional API for LangGraph

LangGraph’s powerful state management— including short- & long-term memory, human-in-the-loop, and time travel — just got even more flexible. With the new...

January 29, 2025

Pytest and Vitest integrations for evaluations in LangSmith

Evaluations (evals) are crucial for building reliable, high-quality LLM applications. They ensure consistent performance, much like tests in software...

January 22, 2025

LangSmith Self-Hosted

LangSmith Self-Hosted v0.9

This release contains important changes for license key verification and sending subscription metrics and operational metadata to LangChain, beta support for...

January 21, 2025

New LangSmith Playground features to streamline workflow

The LangSmith Playground has several new updates, including: New Prompt Settings UI All your prompt settings are now organized in one streamlined view. You...

January 20, 2025

DeepSeek integration in LangChain

DeepSeek has been making waves with R1— a powerful model that reasons like OpenAI’s GPT-4o while exposing its thought process. Now, you can easily use it in...

January 16, 2025

December 2024

LangGraph Platform

Custom authentication & access control for LangGraph Platform

Today, we're thrilled to announce Custom Authentication and Resource-Level Access Control for Python deployments in LangGraph Cloud and self-hosted...

December 20, 2024

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