{"slug": "how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide", "title": "How GenAI works — Through the eyes of an Engineer | Practical Pocket Guide", "summary": "An engineer explains how large language models (LLMs) actually work end to end, covering the context window, tokens, and the black-box nature of the model, in a practical pocket guide aimed at demystifying generative AI.", "body_md": "Member-only story\n\n# How GenAI works — Through the Eyes of an Engineer |Practical Pocket Guide\n\n## If you’re not a Medium member and would like to enjoy this article without restrictions, feel free to use the [friend link here.](https://medium.com/@st.chiotis94/e63eaf721841?sk=36f8204d10123a63bfffd465f796872b) Happy reading!\n\n*This is how an **LLM actually works — end to end, no any mysticism!*\n\n*By the end you’ll know what a “**context window**” really is, why “** tokens”** cost you money, and what people mean when they call the model a “**black box**”.*\n\nI have been absent for some time from **“ sharing my ideas”** — the way I see the\n\n**Information Technology** world through the eyes of an\n\n**Engineer**.\n\n**The reason?** I went deep to build my skillset even further in a domain that is literally growing inside me right now, and I want to share part of that journey with you in this moment!\n\n*Everyone around me will admit it:*\n\nI am an engineer who stays\n\nrelentlessly curiousabout how the world works and how everything is“glued together”— a phrase I use often in my day-to-day work and life.\n\nEven though I occasionally feel pure *“**awe**”** *about where we stand technologically, I still see and compare the world around me as an engine.\n\nPatterns and systems mechanically…", "url": "https://wpnews.pro/news/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide", "canonical_source": "https://pub.towardsai.net/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide-e63eaf721841?source=rss----98111c9905da---4", "published_at": "2026-07-26 11:50:47+00:00", "updated_at": "2026-07-26 12:02:42.451516+00:00", "lang": "en", "topics": ["large-language-models", "generative-ai", "artificial-intelligence"], "entities": [], "alternates": {"html": "https://wpnews.pro/news/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide", "markdown": "https://wpnews.pro/news/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide.md", "text": "https://wpnews.pro/news/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide.txt", "jsonld": "https://wpnews.pro/news/how-genai-works-through-the-eyes-of-an-engineer-practical-pocket-guide.jsonld"}}