[Release] langchain-ai/langchain langchain-anthropic==1.5.2: langchain-anthropic==1.5.2

langchain-anthropic version 1.5.2 has been released with support for Claude Opus 5. This update builds on the previous 1.5.1 release and includes new model capabilities for the Anthropic integration within the LangChain framework. The release enables developers to leverage the latest Claude Opus 5 model through LangChain's unified interface.

Key Points

• •Claude Opus 5 model support added to langchain-anthropic
• •Version bump from 1.5.1 to 1.5.2 indicates a minor feature release
• •Anthropic integration now includes latest Claude model variant
• •Developers can access Claude Opus 5 through LangChain's standard interfaces
• •Release includes PR #39054 for model support and PR #39056 for release management
• •Backward compatible update for existing langchain-anthropic users

Workflow Diagram

Concepts