LangChain DeepSeek

LangChain DeepSeek is an integration package that connects DeepSeek’s large language models with the LangChain framework, enabling developers to build AI applications using DeepSeek’s advanced reasoning capabilities. This integration package provides seamless access to DeepSeek’s models, including the DeepSeek-V3 chat model and DeepSeek-R1 reasoning model, through LangChain’s standardized interface. The integration supports tool calling and structured output with DeepSeek-V3 (deepseek-chat), while DeepSeek-R1 (deepseek-reasoner) focuses on advanced reasoning with exposed thought processes. Developers can access these models by creating a DeepSeek account, obtaining an API key, and installing the langchain-deepseek package. The package includes features like JSON mode, tool-calling capabilities, and structured output parsing, making it suitable for building complex conversational AI systems and reasoning applications. The DeepSeek API uses OpenAI-compatible formatting, allowing for easy integration with existing OpenAI-based workflows.