langchain-openrouter==0.0.1: feat(openrouter): add `langchain-openrouter` provider package (#35211)
LangChain finally gives OpenRouter native support, ending developer workarounds.
Deep Dive
LangChain has released its first official partner package for OpenRouter, called `langchain-openrouter==0.0.1`. This native integration provides direct support for OpenRouter-specific features that the standard `ChatOpenAI` wrapper intentionally blocked. The move resolves at least nine long-standing GitHub issues and supersedes previous community attempts, officially endorsing OpenRouter as a key provider. It also adds warnings against using `base_url` overrides for third-party services, pushing developers toward this sanctioned package.
Why It Matters
This legitimizes OpenRouter in the AI dev stack and simplifies access to dozens of models for 127k LangChain users.