[Release] langchain-ai/langchain langchain-anthropic==1.4.1: langchain-anthropic==1.4.1

langchain-anthropic version 1.4.1 is a maintenance and feature release that includes support for Claude Opus 4.7 features and adaptive thinking mode, fixes for null encrypted_content in compaction blocks, dependency updates (langsmith 0.7.31, pytest 9.0.3), and security patches for Pygments CVE-2026-4539. The release also updates model profiles and improves documentation with typo fixes.

Key Points

• •Support for Claude Opus 4.7 features enabling access to latest model capabilities
• •Adaptive thinking mode support for enhanced reasoning and problem-solving
• •Fixed null encrypted_content handling in compaction blocks to prevent data issues
• •Security patch: Upgraded Pygments to >=2.20.0 to address CVE-2026-4539 vulnerability
• •Dependency updates: langsmith bumped from 0.6.3 to 0.7.31 for improved stability
• •Minimum langchain-core requirement updated to 1.2.21 for compatibility
• •Model profile data refreshed with missing ModelProfile fields and schema drift warnings
• •Documentation improvements including typo fixes and CI/CD optimizations
• •Testing infrastructure enhanced with pytest 9.0.3 and suppressed streaming output in CI

Workflow Diagram

Concepts