Modèle Updated 2026-04

LLM (Large Language Model)

Large Language Model
Definition

An LLM is an AI model trained on billions of texts, capable of understanding and generating human language.

See also in the glossary

R
RAG (Retrieval-Augmented Generation)
RAG is a technique that connects an LLM to external data sources to generate more accurate and up-to-date answers.
P
Prompt
A prompt is the instruction or question you give an AI to get a response. It's the interface between you and the model.
G
Generative AI
Generative AI refers to artificial intelligence systems capable of creating original content: text, images, video, audio, code.
A
AI Agent
An AI agent is an autonomous system that uses an LLM to plan, decide and execute real tasks without human intervention at each step.

Tools that use llm

C
ChatGPT
The world's most used conversational AI assistant
4.6/5
C
Claude
The AI that understands nuance, by Anthropic
4.7/5
G
Gemini
Google's AI assistant with 1M token context
4.5/5
M
Mistral Le Chat
The sovereign European AI, GDPR-compliant
4.5/5

Frequently Asked Questions

What's the difference between an LLM and a chatbot?
A chatbot is a conversational interface. An LLM is the AI engine powering it. ChatGPT is a chatbot, GPT-4 is the LLM behind it.
What are the most popular LLMs in 2026?
GPT-4o and o1 (OpenAI), Claude Opus 4 (Anthropic), Gemini 2.0 (Google), Llama 4 (Meta), and Mistral Large (Mistral AI).
Can an LLM be wrong?
Yes — it's called a hallucination. An LLM generates plausible text but not always accurate. Always verify critical information.