LangChain Changelog

Sign up for our newsletter to stay up to date

Powered by LaunchNotes

Loading...

October 2025

JavaScript Code Evals for faster eval workflows

JavaScript Code Evals allow you to write custom Code Evals in JavaScript in addition to Python. This gives you the flexibility to choose the language that...

October 7, 2025

September 2025

Composite Evaluators in LangSmith

If you’re running multiple evaluators to measure different aspects of your application, it can be difficult to see the overall picture. Composite Evaluators...

September 23, 2025

Middleware in LangChain 1.0 alpha

Middleware in LangChain 1.0 gives you fine-grained control around the core agent loop of models + tools. It includes: Read the blog about middleware and try...

September 16, 2025

Create org-scoped API keys with granular permissions

You can now create org-scoped service keys and optionally, assign roles for created keys. These updates give you more control, allowing you to: Learn more...

September 10, 2025

August 2025

LangGraph Platform

Revision queueing in LangGraph Platform

Keep your deployments smooth and predictable. With Revision Queueing , any new revisions are automatically lined up and processed only after the current one...

August 27, 2025

LangSmith Self-Hosted

LangSmith Self-Hosted v0.11

This release brings customizable LangGraph Platform deployments, streamlined evaluation via Align Evals, running evals directly from Studio, and operational...

August 18, 2025

LangGraph Platform

Trace Mode in LangGraph Studio

Debugging and improving agents just got a lot smoother. With Trace Mode , you can now view your LangSmith traces directly in Studio —no more jumping between...

August 15, 2025

Dynamic tool calling in LangGraph agents

Agents don’t always need the same tools at every step. With dynamic tool calling , you can now control which tools are available at different points in a...

July 2025

LangGraph Platform

Connect traces in LangSmith to server logs in LangGraph Platform

We’ve made agentic observability even easier — you can now connect traces in LangSmith to server logs within the LangGraph Platform. When viewing a trace...

Introducing Align Evals: Streamlining LLM Application Evaluation

Evaluations are a key technique for improving your application — whether you’re working on a single prompt or a complex agent. Iterating on evaluators has...

Powered by LaunchNotes