LangChain Changelog

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June 2024

🧬 Build generative UI applications with LangChain in JavaScript/TypeScript and Python

Using streaming agent events and tool calls to pick pre-built components, you can now use generative UI to improve your chatbot with interactable components....

May 2024

💬 Manage private prompts without a handle

We’ve improved our SDK and LangSmith Prompts UI to make navigating prompts simpler. Now, only public prompts require a handle on creation. New accounts won’t...

🔧 Off-the-shelf online evaluator prompts to catch bad retrieval and hallucinations for RAG

LangSmith’s online evaluator (LLM-as-judge) automatically runs on production traces with a customizable prompt and automation rules. Our new off-the-shelf...

🔁 Repetitions to build confidence in your experiment results

You can now run multiple repetitions of your experiment in LangSmith. This helps smooth out noise from variability introduced by your application or from...

✂️ Dataset splits for evaluation and filtering/editing dataset examples

With dataset splits, it's easier to run evaluations on a subset of your data in LangSmith. You can tag examples with different split names , edit and add to...

📞 Multi-modal function calling in JavaScript

In our @langchain/google-genai or @langchain/google-vertexai packages, we’ve added function calling with structured output, which allows you to build more...

📝 Versioned docs and better structure for LangChain v0.2

We’ve updated our docs for LangChain v0.2 to be separated into: LangChain v0.2 docs walkthrough Check out the new docs in Python and JavaScript , then give...

🚀 LangChain v0.2: Improving the stability and security of the `langchain` package

With the release of LangChain v0.2 , we’ve decoupled the langchain package from langchain-community to improve the stability and security of langchain . With...

🍐 Pairwise Evaluations in LangSmith

For LLM use cases like text generation or chat (where there may not be a single "correct" answer), picking a preferred response with pairwise evaluation can...

🛠️ Personal prompts are now separate from LangChain Hub

Your organization's prompts are now separate from the LangChain Hub. This lets you organize and pull existing prompts by their commit versions — so you can...

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