Quick answer: Generative AI is the umbrella category – any AI that creates new content: text, images, audio, video or code. A Large Language Model (LLM) is one type of generative AI, specialised in language: trained on massive text corpora to understand and produce text. Every LLM is generative AI; most generative AI systems you hear about (ChatGPT, Claude, Gemini) are LLM-powered – but image generators, music models and video models are generative AI with no LLM at their core.
The taxonomy in one view
| Term | What it covers | Examples |
|---|---|---|
| Generative AI | All content-creating AI | ChatGPT, Midjourney, Suno, Sora-class video models |
| LLM | Text-specialised generative models | GPT-4/5 class, Claude, Gemini, Llama |
| Multimodal model | Models spanning text + images/audio/video | GPT-4o class, Gemini, Claude with vision |
| AI engine / answer engine | Products wrapping models with retrieval | ChatGPT search, Perplexity, Google AI Overviews |
How LLMs work, briefly
An LLM learns statistical patterns from enormous text datasets, then predicts the next token given context – a mechanism that, at sufficient scale, produces fluent reasoning-like text, translation, summarisation and code. Crucially for marketers: what an LLM “knows” about your brand is the compressed residue of every mention in its training data – which is why entity consistency across the web now matters commercially.
Why the distinction matters for visibility work
GEO targets LLM-powered answer engines specifically: their training corpora (long-term brand memory) and their retrieval pipelines (live citations – see how RAG works). Image and video generators matter for production workflows but not for answer visibility. Precision about which system you are optimising for keeps strategy – and budget – pointed at the machines that actually recommend businesses.
FAQ
Is ChatGPT an LLM?
ChatGPT is a product built on LLMs (the GPT family), adding chat interface, tools and live search. The distinction explains why “ranking in ChatGPT” involves both model memory and retrieval (both tracks here).
What is an AI agent then?
An LLM given tools and autonomy to complete multi-step tasks – browsing, booking, buying. Agents acting for consumers are becoming a marketing audience in their own right.
Want your brand legible to every layer of this stack? Adexorb Technologies makes businesses visible to the machines that recommend them.