[Release] langchain-ai/langchain langchain-openrouter==0.2.8: langchain-openrouter==0.2.8

langchain-openrouter version 0.2.8 release includes bug fixes and feature enhancements for OpenRouter integration. Key improvements focus on preserving cost metadata in usage chunks and maintaining provider information in response metadata. Multiple model profile data refreshes ensure up-to-date model configurations across the release cycle.

Key Points

• •Preserve cost metadata in usage chunks for accurate billing and cost tracking (#39338)
• •Maintain provider information in response metadata for better request traceability (#39301)
• •Regular model profile data refreshes to keep model configurations current and accurate
• •Bug fixes ensure compatibility with OpenRouter API responses
• •Incremental updates from 0.2.7 to 0.2.8 maintain backward compatibility
• •Model profile maintenance is a continuous process with frequent updates
• •Cost and provider metadata preservation improves observability in LLM operations

Workflow Diagram

Concepts