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The latest AI and developer news from LangChain Blog, with short summaries.

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Open Models Have Crossed the Threshold

·2026.04.03 02:00

LangChain Newsletter, March 2026

·2026.04.02 06:00

LangChain and MongoDB Announce Partnership: An AI Agent Stack Running on a Database You Already Trust

·2026.04.01 02:00

A Checklist for Preparing Agent Evals

·2026.03.27 23:00

Agent Evaluation Readiness Checklist

·2026.03.27 23:00

Kensho Solves Reliable Financial Data Retrieval with LangGraph-Based Multi-Agent Framework

·2026.03.27 04:00

How to Build Evals for Deep Agents

·2026.03.27 00:00

How to Build Evals for Deep Agents

·2026.03.27 00:00

How to Customize Agent Harnesses Using Middleware

·2026.03.26 23:00

LangSmith Fleet Supports Skills Feature

·2026.03.26 01:00

How Moda Built a Production-Grade AI Design Agent Using Deep Agents

·1·2026.03.25 02:00

Join LangChain at Google Cloud Next 2026

·2026.03.24 06:00

Two Types of Agent Authorization Methods

·2026.03.24 02:00

Introducing LangSmith Fleet

·2026.03.20 01:00

LangSmith Officially Launches 'Polly,' an AI Assistant Usable Across All Work Environments

·2026.03.19 00:00

The Structure of Agent Harnesses

·2026.03.11 11:00

How LangChain Built Its GTM Agent

·2026.03.10 00:00

Technical Evaluation Methodology

·2026.03.06 03:00

monday Service + LangSmith: A Code-Centric Evaluation Strategy Built from Day One

·2026.02.18 17:00

On Agent Frameworks and Agent Observability

·2026.02.13 11:00