[Release] langchain-ai/langchain langchain-perplexity==1.3.0: langchain-perplexity==1.3.0

langchain-perplexity version 1.3.0 introduces a new `use_responses_api` flag on the `ChatPerplexity` class, enabling alternative API response handling. The release includes multiple dependency updates for langsmith, langchain-core, urllib3, and idna to improve security and compatibility. Infrastructure improvements focus on dependency management and CI/CD hardening.

Key Points

• •New `use_responses_api` flag added to `ChatPerplexity` for flexible API response handling
• •langsmith dependency upgraded from 0.7.31 to 0.8.5 across multiple patch cycles
• •langchain-core bumped to 1.3.3 for improved core functionality
• •urllib3 updated to 2.7.0 for enhanced HTTP client security
• •idna library upgraded to 3.15 for better internationalized domain name handling
• •langchain-tests floor dependency raised to 1.1.9 for stricter test compatibility
• •Dependabot CI/CD hardening implemented to preserve version bounds during updates
• •Multiple incremental dependency updates suggest active maintenance and security patching

Workflow Diagram

Concepts