LangChain Changelog

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October 2025

No Code Agent Builder in LangSmith, now in private preview

We're expanding who can build agents beyond developers with LangSmith Agent Builder— a no-code agent-building experience now in private preview. Build real...

October 29, 2025

`deepagents` 0.2 release for more autonomous agents

deepagents is our agent harness for building autonomous, long-running agents that tackle complex, open-ended tasks over extended time horizons. Our 0.2...

October 28, 2025

Discover patterns in production traces with the Insights Agent

Traces contain valuable signal about an agent's capabilities and how users engage with it. Insights Agent helps you find signal into your traces by analyzing...

October 23, 2025

LangSmith Self-Hosted

LangSmith Self-Hosted v0.12

This release includes improvements to evaluations: online multi-turn evaluations, composite feedback scores and JavaScript code evals. It also includes...

October 23, 2025

Evaluate end-to-end agent interactions with Multi-turn Evals

Today, we're launching Multi-turn Evals to help you measure how your agent is performing across an entire end-to-end interaction. Multi-turn evals are online...

October 23, 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

LangChain 1.0 now generally available

LangChain 1.0 is our first major stable release, marking our commitment to no breaking changes until 2.0. After three years of feedback, we've streamlined...

October 22, 2025

Improved dataset creation: faster and more flexible

Uploading data from an existing CSV/JSONL files is one of the easiest ways to get started with datasets and experiments. We’ve revamped the upload flow to...

October 17, 2025

Product naming changes: LangSmith Deployment and LangSmith Studio

We’ve updated product names across the LangSmith UI, docs, and website to make it clearer how our tools fit together. What changed You’ll see these new names...

October 14, 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

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