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AI Glossary · Last reviewed May 2026

AI Models

ay-eye mah-dulz · noun· Artificial Intelligence Models
Hand-written by a real person. Reviewed against current practice in May 2026.
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Definition

Pre-trained systems that process inputs like text, images or code and generate intelligent outputs based on patterns learned from large datasets.

Why it matters

Every AI tool you use is powered by one or more AI models under the hood. Understanding models helps you pick the right tool, because the model determines what it can do, how accurate it is, and what it costs.

For example, a writing assistant built on GPT-4 will produce different results than one built on Claude or an open-source model like Llama. Knowing this lets you match the tool to your task instead of guessing.

How it works

3 steps
STEP 01
Training
The model processes billions of text, image or code samples and learns statistical patterns from them.
STEP 02
Fine-tuning
The base model is further trained on specific data to improve performance for particular tasks like coding, medical advice, or customer support.
STEP 03
Inference
When you send a prompt, the model uses its learned patterns to generate a relevant response in real time.

Frequently asked questions

What is the difference between an AI model and an AI tool?+

An AI model is the engine - the trained system that does the thinking. An AI tool is the product built around it with a user interface, extra features, and a specific use case. ChatGPT is a tool; GPT-4 is the model powering it.

Are open-source models as good as proprietary ones?+

For many tasks, yes. Models like Llama and Mistral perform well for coding, writing, and analysis. Proprietary models like GPT-4 and Claude tend to lead on complex reasoning, but the gap is narrowing.

How do I know which model an AI tool uses?+

Check the tool documentation or pricing page. Many tools disclose their model. On AI Tool Seekers, we list the underlying model when known.

Can I run AI models on my own computer?+

Yes, many open-source models can run locally using tools like Ollama, LM Studio, or llama.cpp. You need a decent GPU for larger models, but smaller ones run on regular hardware.

Explore other terms

From the glossary
AI Agents
A program that takes goals and figures out the steps to reac...
API
The way one piece of software talks to another.
Chain of Thought
A prompting technique where the model reasons out loud, step...
Context Window
How much text a model can read at once.
Embeddings
Numeric fingerprints of text or images that let computers me...
Few-shot Learning
Showing a model two to five examples in the prompt so it fol...
View all 23 terms
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