[Release] langchain-ai/langchain langchain-core==1.2.26: langchain-core==1.2.26

LangChain Core v1.2.26 release includes fixes for Bedrock model initialization and serialization, adds ChatBaseten to the serializable mapping, removes deprecated gpt-3.5-turbo references from documentation, and corrects parameter names in filter_messages docstring examples. This patch release focuses on improving model compatibility, serialization support, and documentation accuracy.

Key Points

• •Added init validator and serialization mappings for Bedrock models to improve AWS Bedrock integration
• •Integrated ChatBaseten model into the serializable mapping for enhanced model support
• •Removed gpt-3.5-turbo from docstrings to reflect deprecation and guide users toward current models
• •Fixed parameter name errors in filter_messages docstring example to prevent user confusion
• •Patch release (1.2.26) maintains backward compatibility while addressing bugs and documentation gaps
• •Serialization improvements enable better model persistence and state management
• •Documentation updates ensure examples match actual API signatures

Workflow Diagram

Concepts