[Release] langchain-ai/langchain langchain-anthropic==1.3.4: langchain-anthropic==1.3.4

langchain-anthropic version 1.3.4 release includes bug fixes for OpenAI response block filtering, model ID updates, and integration test improvements. Key features added include ChatAnthropicBedrock wrapper, User-Agent header support for Anthropic API calls, and max input token configuration based on context beta headers.

Key Points

• •Fixed OpenAI Responses block type filtering to prevent incompatible response formats in Anthropic integration
• •Updated integration tests to ensure compatibility with latest Anthropic API changes
• •Replaced retired model IDs in tests and docstrings to maintain accuracy with current Anthropic models
• •Added ChatAnthropicBedrock wrapper for AWS Bedrock integration support
• •Implemented User-Agent header for Anthropic API calls to improve request tracking and debugging
• •Fixed cache_control hoisting from tool_result content sub-blocks to tool_result level for proper caching behavior
• •Set max input tokens dynamically based on 1m context beta header for better token management
• •Bumped langsmith dependency from 0.4.43 to 0.6.3 for improved logging and monitoring capabilities
• •Sorted generated model profiles by model ID for stable and reproducible diffs in version control

Concepts