@atmorouter.dev: AI for Beginners #10: what is RAG? 📚 Episode 1: LLMs. Episode 2: tokens. Episode 3: prompts. Episode 4: APIs. Episode 5: AI agents. Episode 6: temperature. Episode 7: context windows. Episode 8: embeddings. Episode 9: hallucinations. Today: RAG, how an AI looks things up before it answers. • Google Cloud: RAG (Retrieval-Augmented Generation) combines traditional information retrieval (search and databases) with generative LLMs, so grounded answers are more accurate, up to date and relevant to your data. • AWS: RAG makes an LLM reference an authoritative knowledge base outside its training data before it responds, without retraining the model. • How it works: your question searches a knowledge source first, the relevant information is added to your prompt, and the LLM answers using that plus what it already knows. • Under the hood (Anthropic): documents are split into chunks of a few hundred tokens, turned into embeddings and stored in a vector database; each query pulls the most relevant chunks into the prompt. • Do you need it? Anthropic says if your knowledge base is under 200,000 tokens (about 500 pages), you can just put it all in the prompt. • Better retrieval: Anthropic's Contextual Retrieval cut failed retrievals by 49%, and by 67% with reranking (5.7% to 1.9%). • The term comes from Lewis et al., "Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks" (NeurIPS 2020). Sources: Google Cloud, "What is Retrieval-Augmented Generation (RAG)?": cloud.google.com/use-cases/retrieval-augmented-generation AWS, "What is RAG?": aws.amazon.com/what-is/retrieval-augmented-generation Anthropic Engineering, "Contextual Retrieval": anthropic.com/engineering/contextual-retrieval Lewis et al., arXiv:2005.11401: arxiv.org/abs/2005.11401 Building a RAG app? AtmoRouter is the cheapest AI API gateway: one OpenAI-compatible endpoint for 100+ embedding and chat models, up to 95% off official price 👉 atmorouter.dev Follow for the next episode of AI for Beginners. #AI #AIforBeginners #RAG #LLM #Embeddings #VectorDatabase #LearnAI #Developer #AtmoRouter #GenerativeAI

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Monday 09 November 2026 05:39:00 GMT