AI lexicon

Artificial Intelligence Glossary

The essential AI terms, explained simply and without jargon. So you understand what everyone is talking about.

Artificial intelligence (AI)
Computer systems capable of carrying out tasks that normally require human intelligence: understanding text, generating images, making decisions.
Language model (LLM)
A model trained on huge amounts of text to understand and generate language. ChatGPT and its counterparts are examples.
Prompt
The instruction you give an AI. The quality of the prompt largely determines the quality of the answer.
AI agent
An AI that doesn't just answer but gets tasks done: it chains steps together and uses tools.
Hallucination
When an AI invents false information and presents it as true. Hence the importance of human verification.
Machine learning
Systems that learn from data rather than being programmed rule by rule.
Fine-tuning
Specializing an existing model on your own data to adapt it to your business.
RAG
Retrieval-Augmented Generation: connecting an AI to your documents so it answers from your real data.
Open source
Models whose code is open: you can host and run them yourself, the key to data sovereignty.
Inference
The moment the model processes your request and produces an answer. Where it happens (EU or US) matters for sovereignty.
Token
The unit of text a model processes (a piece of a word). Billing and limits are often expressed in tokens.
API
An interface that lets your software communicate with an AI in an automated way.
Data sovereignty
Keeping control over where your data is stored and processed, and over who can access it.
Automation
Handing repetitive tasks over to systems to free up human time. AI expands what can be automated.
LPD / nLPD
The Swiss data protection act, which governs the processing of personal data.

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AI Glossary | Artificial Intelligence Terms Explained