Understanding Large Language Models: Core of Modern AI

Harry Guinness· July 3, 2026 View original

▶ The 2-minute explainer

Summary

Large Language Models (LLMs) are the foundational technology behind popular AI applications like ChatGPT, Claude, and code generation tools. They power chatbots, text generation, summarization, and automation features across various platforms, including Google's AI answers and Apple Intelligence.

Large Language Models (LLMs) represent the core technology driving much of today's artificial intelligence. These models are the underlying engine for widely recognized AI tools such as ChatGPT and Claude, enabling capabilities like conversational interfaces, text creation, and summarization. Beyond chatbots, LLMs are also crucial for advanced functions like code generation, as seen in Claude Code and Codex, and are integrated into major platforms like Google's AI answers and Apple Intelligence. Essentially, any AI feature involving text manipulation, code writing, or computer automation likely leverages an LLM.

Why it matters

Understanding LLMs is fundamental for professionals navigating the AI landscape, as they are central to most current AI applications and future innovations across industries.

How to implement this in your domain

  1. 1Identify current business processes that could be enhanced by LLM-powered tools.
  2. 2Research specific LLMs and their capabilities relevant to your industry's needs.
  3. 3Experiment with public LLM interfaces to understand their strengths and limitations firsthand.
  4. 4Consider training or upskilling teams on prompt engineering techniques for effective LLM interaction.

Who benefits

Software DevelopmentMarketingCustomer ServiceContent CreationEducation

Key takeaways

  • LLMs are the backbone of many modern AI applications.
  • They enable diverse functions like text generation, summarization, and code writing.
  • Understanding LLMs is crucial for effective AI adoption and strategy.
  • Major tech companies are deeply integrating LLMs into their core products.

Original post by Harry Guinness

"Large language models (LLMs) are what most people think of when they think of AI. They're what you're interacting with in ChatGPT and Claude, they write the code generated by Claude Code and Codex, and they power other AI features like Google's AI answers and Apple Intelligence.…"

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