OpenGPTs

OpenGPTs is an open-source GPT store that recently underwent updates to fully integrate with LangGraph, which is an extension of LangChain designed to build agents as graphs. This update introduces MessageGraph, a graph system where nodes process messages, reflecting the I/O of chat completion models and facilitating communication in distributed systems. Three cognitive architectures are available: Assistants, which use language models (LLMs) to decide on actions; RAG, which focuses on document retrieval; and ChatBot, which operates through system messages. Persistence is achieved through LangGraph checkpoints, saving chat states to Redis, while configurability allows users to select LLMs, system messages, and tools, with configurations saved for future use. New models like Google's Gemini and Mixtral have been added, though challenges remain in using open-source models reliably for Assistants. A new tool, Robocorp’s Action Server, allows the definition of arbitrary Python functions as tools, enhancing versatility. The astream_events method is employed to stream events, such as new tokens and function calls, which are then filtered and displayed to users. The OpenGPTs platform remains open to community contributions, particularly in improving open-source model reliability and supporting additional tools.

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