LangChain Core 1.6.3 has been published, building on the previous 1.6.2 release. This update introduces a new capability that allows model name and provider tracing metadata to be overridden based on the response from a gateway, giving self-hosted users more accurate observability when routing requests through intermediary services. Additionally, the release includes test coverage for […]
LangChain Core version 1.6.2 has been released, following version 1.6.1. This update introduces a notable enhancement for OpenAI integrations: support for asynchronous tools, allowing developers to define tools that can be awaited within the LangChain tool-calling flow. This makes it easier to build non-blocking applications. The release also includes routine dependency maintenance, updating the mistune
LangChain Core 1.6.2 Brings Async Tool Support and Key Fixes Read More »
The langchain-anthropic library has been updated to version 1.7.1, a minor release that builds on 1.7.0 with targeted improvements for developers working with Anthropic models through LangChain. This update introduces performance optimizations by omitting middleware trace inputs when they are not needed, reducing overhead in tracing pipelines. Users maintaining self-hosted LangChain deployments should notice lighter
LangChain-Anthropic 1.7.1 Brings Performance Tuning and Claude Fable 5.1 Support Read More »
The LangChain team has shipped a rapid sequence of alpha releases, culminating in langchain 1.4.0a4, with a major focus on native Model Context Protocol (MCP) support and a much more capable agent middleware system. A new langchain.mcp namespace introduces the MCPAdapter, which lets LangChain agents connect to MCP servers built with FastMCP. The adapter now
LangChain 1.4.0 Alpha Brings Native MCP Support and Strengthened Middleware Read More »
LangChain is introducing an alpha preview of langchain.mcp, a first-party adapter that converts any MCP server into LangChain tools ready to be passed directly to create_agent. The connection layer is powered by FastMCP, which means all of its client capabilities are available without being re-created behind a more limited interface. pip install “langchain[mcp]==1.4.0a2” Connect With
LangChain MCP Adapter Alpha Connects Any MCP Server to Your Agents Read More »
LangChain has released version 1.3.17, moving forward from 1.3.16 with a targeted bug fix and routine maintenance updates. This release is primarily aimed at users who rely on human-in-the-loop workflows. The main change addresses a bug in how custom rejection reasons are framed during human-in-the-loop interactions. Previously, when a human reviewer rejected an action with
LangChain 1.3.17: Custom Human-in-the-Loop Rejection Reasons Fixed Read More »
The langchain-core library has been updated to version 1.5.3, delivering a small but crucial fix for self-hosted users. A previous issue could cause gateway authentication failures when an API key wasn’t explicitly configured in certain environments. This release patches that behavior by automatically falling back to the LANGSMITH_API_KEY environment variable, ensuring seamless connectivity and reducing
LangChain Core 1.5.3 Fixes Gateway Authentication Fallback Read More »
LangChain Core version 1.5.2 is now available, bringing a targeted bug fix and several routine dependency updates. The most notable change resolves an issue where empty string values in gateway environment variables were not handled correctly, which could lead to unexpected behavior in certain configurations. This fix ensures more robust handling of environment settings for
LangChain Core v1.5.2 Released with Bug Fix and Dependency Updates Read More »
