LangChain Azure OpenAI

LangChain Azure OpenAI is the wrapper that routes calls from LangChain to Microsoft’s Azure-hosted OpenAI Service, giving teams GPT-4o, GPT-4 Turbo, or GPT-3.5 access inside a secure, tenant-isolated cloud. By exporting four environment variables—AZURE_OPENAI_ENDPOINT, AZURE_OPENAI_KEY, AZURE_OPENAI_DEPLOYMENT_NAME, and AZURE_OPENAI_API_VERSION—developers drop the model into any chain, agent, or Retrieval-Augmented Generation (RAG) pipeline just like the public OpenAI API. The wrapper exposes standard methods (generate, stream, get_num_tokens), supports function calling, and integrates with LangChain callbacks for token-level streaming, latency logging, and cost tracking. Identity-based auth works with Managed Identities or Azure Key Vault, while private endpoints and regional data residency satisfy SOC 2, HIPAA, and GDPR requirements. Paired with Azure Cognitive Search or a vector database, LangChain Azure OpenAI delivers end-to-end, enterprise-grade RAG that never leaves the customer’s subscription—future-proofing LLM apps with one line of configuration.