LangChain Changelog

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October 2025

LangGraph 1.0 is now generally available

LangGraph 1.0 is the first stable major release in the durable agent framework space —a major milestone for production-ready AI systems. After more than a...

October 22, 2025

August 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...

June 2025

LangGraph Workflow Updates (Python & JS)

We’ve rolled out a batch of new features across both LangGraph.js and LangGraph for Python — giving you faster development cycles, more efficient executions,...

May 2025

Node-level caching in LangGraph

You can now cache the results of tasks in LangGraph based on node input , helping you avoid redundant computation and speed up execution. How it works: See...

Deferred nodes in LangGraph

LangGraph now supports deferred node execution , allowing you to create more sophisticated flows where a node only runs after all parallel branches have...

MCP with streamable HTTP transport

You can now connect LangGraph agents to remote MCP servers reliably via the new recommended transport - streamable HTTP. Check out the docs to see an...

March 2025

Prompt engineering LangGraph Studio

You can now view and edit your node logic (such as prompts) directly within the Studio UI. See which nodes use specific assistant fields and edit them...

LangGraph BigTool for providing agents access to a large number of tools

langgraph-bigtool is a Python library for creating LangGraph agents that can access large numbers of tools. Key features include: • Scalable access to tools:...

LangGraph Swarm for building multi-agent systems

We now have a lightweight library for building swarm-style multi-agent systems with LangGraph. Key features include: The library is available via pip install...

LangGraph 0.3: Pre-built agents

LangGraph has always been about giving full control over your AI agents—no hidden prompts, no enforced architectures. But we also know that getting started...

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