LangChain Changelog

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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

🔁 Modify graph state from tools in LangGraph

LangGraph's latest update gives you greater control over your agents by enabling tools to directly update the graph state. This is a game-changer for use...

December 18, 2024

🔍 Diff view in LangSmith's prompt hub

We’ve added a new Diff View feature in LangSmith’s Prompt Hub. As prompts evolve, keeping track of changes can get tricky—especially when iterating rapidly....

December 17, 2024

`interrupt`: Simplifying human-in-the-loop agents

Our latest feature in LangGraph, interrupt , makes building human-in-the-loop workflows easier. Agents aren’t perfect, so keeping humans “in the loop”...

December 16, 2024

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