LangChain Changelog

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May 2025

Monthly usage charts for easy tracking in LangSmith

We’ve rolled out monthly usage charts for SaaS customers in LangSmith. You can now track all billable metrics (as defined in Metronome) in one place on the...

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...

LangSmith now supports MCP

Every deployed agent on LangSmith now exposes its own MCP endpoint. Leverage your agents as tools in any client supporting streamable HTTP for MCP— no custom...

LangGraph Platform GA: Deploy & manage long-running, stateful agents

LangGraph Platform is now generally available. Build, deploy, and manage long-running, stateful agents — at scale. LangGraph Platform is our purpose-built...

LangGraph Studio v2: Run and debug production traces locally

Our new and improved version of LangGraph Studio v2 allows you to: - Run locally (without using desktop app) - Edit prompts and other configuration directly...

Open Agent Platform: No-code platform to build agents

Open Agent Platform is our latest open-source, no-code agent building platform that lets you create, manage, and use LangGraph agents. Whether you're...

Agent Observability: Gain Insights into Tool Calls & Run Stats

We've launched new levels of visibility for agents to help you understand what your agent is doing! You can now get visibility into tool calls and run stats:...

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...

Multimodal support in LangSmith

LangSmith now supports images, PDFs, and audio files across the playground, annotation queues, and datasets — making it easier than ever to build, test, and...

April 2025

LangGraph v0.4: Working with Interrupts

Just shipped LangGraph v0.4! This release brings major upgrades for working with interrupts: • Interrupts are now surfaced automatically when you call...

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