The Paisol glossary
Plain-English definitions of the AI, engineering, and data terms we use every day. Written for founders, not for other engineers.
AI / LLM
AI Agent
An AI agent is an LLM-powered software system that takes actions — calling APIs, querying data, executing multi-step workflows — to achieve a goal.
Read definitionEmbedding
An embedding is a numerical vector that represents the meaning of a piece of text (or image, or audio) so similar items have similar vectors.
Read definitionFine-tuning
Fine-tuning is retraining (a copy of) an LLM's weights on your examples to teach it style, format, or domain-specific behavior.
Read definitionLangGraph
LangGraph is a production-grade agent orchestration framework from the LangChain team — built on a graph-based stateful workflow model.
Read definitionLLM (Large Language Model)
An LLM is a neural network trained on massive amounts of text that can generate, summarize, classify, and reason about language — GPT-4, Claude, Llama, Gemini.
Read definitionMLOps
MLOps is the practice of deploying, monitoring, and continuously improving machine-learning models in production.
Read definitionRAG (Retrieval-Augmented Generation)
RAG is a technique that lets an LLM answer questions using your private documents by retrieving relevant chunks before generating the response.
Read definitionVector Database
A vector database stores numerical embeddings of text, images, or audio and lets you retrieve semantically similar items by similarity search.
Read definition